Product Description
Product Description:
Air Compressor Pump For Sale Dental Air Compressor
Technical Parameters:
|
Voltage |
110V/220V |
Frequency |
AC 60Hz/50Hz |
|
Ampere |
7.5 A |
Power |
1350W |
|
Volume Flow |
162L/min |
Rated exhaust pressure |
0.8Mpa |
|
Noise |
65-70db |
Tank Capacity |
60L |
|
Gross Weight |
67kg |
Product Size |
88*48*77cm |
Advantage:
|
Silent |
Low working noise, create a quiet working environment. |
|
Low vibration |
With special rubber feet, reduce vibration during operation. |
|
Core technology |
Diamond hardness cylinder ensure durable working performance. |
|
Easy operation |
Quite simple operation, connect to power supply, just drainage regularly |
HOT SALE
Packing & Delivery(100% calibration before shipment)
Our belief:
We will make every effort to deliver superior value to customers with simple, innovation and quality products
Quality working environment, quality products, close services for the betterment of dentistry worldwide
We’d like to make friends with colleagues from all circles with fine quality products,favorable prices and perfect services and create a beautiful future of the national dentistry industry! ! !
FAQ
Q1:Are you a company or factory?
Yes,we are a dental equipment manufacturer in HangZhou,China.
Q2:What ‘s your advantage?
KJ Dental founded in 2008,professional dental chair & dental chair spare parts manufacturer. Providing good after-sale service and competitive price.
Q3:What is your warranty?
Have 1 year warranty.If having any problems,you can send us photos,we will give you the spare parts for free.
Q4:How about the delivery days?
It depends on the quantity and model you order. Normally,2-3days.
Q5:What certificates do CHINAMFG have?
We have the ISO 13485:2003, EN ISO13485:2012,our product got the CE certificated. We also have different kinds of certificates and documents to meet with different foreign countries.For more information,pls contact us.
| Teeth Whitening Method: | Cold Light Whitening |
|---|---|
| Applicable Departments: | Oral Rehabilitation Department |
| Certification: | ISO, CE, ISO13485 |
| Type: | Dental Auxiliary Materials |
| Material: | Metal |
| Lubrication Style: | Oil-Free |
.webp)
What is the role of air compressors in power generation?
Air compressors play a significant role in power generation, supporting various operations and equipment within the industry. Here are some key roles of air compressors in power generation:
1. Combustion Air Supply:
Air compressors are used to supply compressed air for the combustion process in power generation. In fossil fuel power plants, such as coal-fired or natural gas power plants, compressed air is required to deliver a steady flow of air to the burners. The compressed air helps in the efficient combustion of fuel, enhancing the overall performance and energy output of the power plant.
2. Instrumentation and Control:
Air compressors are utilized for instrumentation and control systems in power generation facilities. Compressed air is used to operate pneumatic control valves, actuators, and other pneumatic devices that regulate the flow of steam, water, and gases within the power plant. The reliable and precise control provided by compressed air ensures efficient and safe operation of various processes and equipment.
3. Cooling and Ventilation:
In power generation, air compressors are involved in cooling and ventilation applications. Compressed air is used to drive air-operated cooling fans and blowers, providing adequate airflow for cooling critical components such as generators, transformers, and power electronics. The compressed air also assists in maintaining proper ventilation in control rooms, substations, and other enclosed spaces, helping to dissipate heat and ensure a comfortable working environment.
4. Cleaning and Maintenance:
Air compressors are employed for cleaning and maintenance tasks in power generation facilities. Compressed air is utilized to blow away dust, dirt, and debris from equipment, machinery, and electrical panels. It helps in maintaining the cleanliness and optimal performance of various components, reducing the risk of equipment failure and improving overall reliability.
5. Pneumatic Tools and Equipment:
In power generation plants, air compressors provide the necessary compressed air for operating pneumatic tools and equipment. These tools include impact wrenches, pneumatic drills, grinders, and sandblasting equipment, which are utilized for installation, maintenance, and repair tasks. The high-pressure air generated by compressors enables efficient and reliable operation of these tools, enhancing productivity and reducing manual effort.
6. Nitrogen Generation:
Sometimes, air compressors are used in power generation for nitrogen generation. Compressed air is passed through a nitrogen generator system, which separates nitrogen from other components of air, producing a high-purity nitrogen gas stream. Nitrogen is commonly used in power plant applications, such as purging systems, blanketing in transformers, and generator cooling, due to its inert properties and low moisture content.
7. Start-up and Emergency Systems:
Air compressors are an integral part of start-up and emergency systems in power generation. Compressed air is utilized to power pneumatic starters for gas turbines, providing the initial rotation needed to start the turbine. In emergency situations, compressed air is also used to actuate emergency shutdown valves, safety systems, and fire suppression equipment, ensuring the safe operation and protection of the power plant.
Overall, air compressors contribute to the efficient and reliable operation of power generation facilities, supporting combustion processes, control systems, cooling, cleaning, and various other applications critical to the power generation industry.
.webp)
What safety precautions should be taken when working with compressed air?
Working with compressed air requires adherence to certain safety precautions to prevent accidents and ensure the well-being of individuals involved. Here are some important safety measures to consider:
1. Personal Protective Equipment (PPE):
Wear appropriate PPE, including safety goggles or a face shield to protect eyes from flying debris or particles, hearing protection to reduce noise exposure, and gloves to safeguard hands from potential hazards.
2. Compressed Air Storage:
Avoid storing compressed air in containers that are not designed for this purpose, such as soda bottles or makeshift containers. Use approved and properly labeled air storage tanks or cylinders that can handle the pressure and are regularly inspected and maintained.
3. Pressure Regulation:
Ensure that the air pressure is regulated to a safe level suitable for the equipment and tools being used. High-pressure air streams can cause serious injuries, so it is important to follow the manufacturer’s recommendations and never exceed the maximum allowable pressure.
4. Air Hose Inspection:
Regularly inspect air hoses for signs of damage, such as cuts, abrasions, or leaks. Replace damaged hoses immediately to prevent potential accidents or loss of pressure.
5. Air Blowguns:
Exercise caution when using air blowguns. Never direct compressed air towards yourself or others, as it can cause eye injuries, hearing damage, or dislodge particles that may be harmful if inhaled. Always point blowguns away from people or any sensitive equipment or materials.
6. Air Tool Safety:
Follow proper operating procedures for pneumatic tools. Ensure that tools are in good working condition, and inspect them before each use. Use the appropriate accessories, such as safety guards or shields, to prevent accidental contact with moving parts.
7. Air Compressor Maintenance:
Maintain air compressors according to the manufacturer’s guidelines. Regularly check for leaks, clean or replace filters, and drain moisture from the system. Proper maintenance ensures the safe and efficient operation of the compressor.
8. Training and Education:
Provide adequate training and education to individuals working with compressed air. Ensure they understand the potential hazards, safe operating procedures, and emergency protocols. Encourage open communication regarding safety concerns and implement a culture of safety in the workplace.
9. Lockout/Tagout:
When performing maintenance or repairs on compressed air systems, follow lockout/tagout procedures to isolate the equipment from energy sources and prevent accidental startup. This ensures the safety of the individuals working on the system.
10. Proper Ventilation:
Ensure proper ventilation in enclosed areas where compressed air is used. Compressed air can displace oxygen, leading to a potential risk of asphyxiation. Adequate ventilation helps maintain a safe breathing environment.
By adhering to these safety precautions, individuals can minimize the risks associated with working with compressed air and create a safer work environment.
.webp)
What is the impact of tank size on air compressor performance?
The tank size of an air compressor plays a significant role in its performance and functionality. Here are the key impacts of tank size:
1. Air Storage Capacity: The primary function of the air compressor tank is to store compressed air. A larger tank size allows for greater air storage capacity. This means the compressor can build up a reserve of compressed air, which can be useful for applications that require intermittent or fluctuating air demand. Having a larger tank ensures a steady supply of compressed air during peak usage periods.
2. Run Time: The tank size affects the run time of the air compressor. A larger tank can provide longer continuous operation before the compressor motor needs to restart. This is because the compressed air in the tank can be used to meet the demand without the need for the compressor to run continuously. It reduces the frequency of motor cycling, which can improve energy efficiency and prolong the motor’s lifespan.
3. Pressure Stability: A larger tank helps maintain stable pressure during usage. When the compressor is running, it fills the tank until it reaches a specified pressure level, known as the cut-out pressure. As the air is consumed from the tank, the pressure drops to a certain level, known as the cut-in pressure, at which point the compressor restarts to refill the tank. A larger tank size results in a slower pressure drop during usage, ensuring more consistent and stable pressure for the connected tools or equipment.
4. Duty Cycle: The duty cycle refers to the amount of time an air compressor can operate within a given time period. A larger tank size can increase the duty cycle of the compressor. The compressor can run for longer periods before reaching its duty cycle limit, reducing the risk of overheating and improving overall performance.
5. Tool Compatibility: The tank size can also impact the compatibility with certain tools or equipment. Some tools, such as high-demand pneumatic tools or spray guns, require a continuous and adequate supply of compressed air. A larger tank size ensures that the compressor can meet the air demands of such tools without causing pressure drops or affecting performance.
It is important to note that while a larger tank size offers advantages in terms of air storage and performance, it also results in a larger and heavier compressor unit. Consider the intended application, available space, and portability requirements when selecting an air compressor with the appropriate tank size.
Ultimately, the optimal tank size for an air compressor depends on the specific needs of the user and the intended application. Assess the air requirements, duty cycle, and desired performance to determine the most suitable tank size for your air compressor.
editor by CX 2023-10-02
China Good quality Diesel Portable Screw Air Compressor for Oil Gas Exploration Drilling air compressor for car
Product Description
Product Description
1.Gas Control System: It is simple and reliable. Inlet rate from 0 to 100% and be adjusted automatically depending on the gas consumption. Automatically adjust the engine throttle to save diesel fuel.
2.Microcomputor Intelligent Control: Air compressor discharge pressure, exhaust gas temperature, engine speed, oil pressure, water temperature and fuel tank level operating parameters with automatic alarm and shutdown protection.
3.Multi-Stage Air Filter and Large Oil-Water Cooler: It is not only suitable for dusty work environment, but it is suitable for high temperature and high altitude environment.
4.Parts and Components: They can be maintained within the accesible range which is convenient and easy.
5.Covenient: Easy to move in rough terrain.Each compressor has lifting rings on the top for safe hoisting and transportation.
Product Parameters
| Single Stage Compression Portable Diesel Screw Air Compressor | |||||
| Model | Capacity | Pressure | Diesel engine type | Weight | Dimensions |
| m3/min | bar | KGS | L×W×H mm | ||
| SYC-3/7 | 2.8 | 7 | 32kw | 1000 | 2200*1560*1400 |
| SYC-5/7 | 5 | 7 | 41KW | 1100 | 2821X1470X1361 |
| SYC-6/8 | 6 | 8 | 55kW | 1400 | 3750×1920×1700 |
| SYC-7/8 | 7 | 8 | 4D80-K20,58kW | 1400 | 3750×1920×1700 |
| SYC-8/7 | 8 | 7 | 65kw | 1400 | 3750×1920×1700 |
| SYC-8/8 | 8 | 8 | 65kw | 1400 | 3750×1920×1700 |
| SYC-9/8 | 8.8 | 8 | 75kW | 1600 | 3750×1920×1700 |
| SYC-10/7 | 10 | 7 | YC4D95Z-K20,70kW | 1900 | 3900×1920×1700 |
| SYC-8.5/14 | 8.5 | 14 | 4BTA3.9-C125,93kW | 1900 | 3900×1920×1900 |
| SYC-10/10 | 10 | 10 | 4BTA3.9-C125,93kW | 1900 | 3900×1920×1900 |
| SYC-10/13 | 10 | 13 | 4BTA3.9-C125,93kW | 2050 | 4080×1980×2350 |
| SYC-13/10 | 13 | 10 | 4BTA3.9-C125,93kW | 2050 | 4080×1980×2350 |
| SYC-12/7 | 12 | 7 | 4BTA3.9-C125,93kW | 2050 | 3900×1980×1900 |
| SYC-12/12 | 12 | 12 | 6BTA5.9-C180,132kW | 2380 | 4080×1980×2350 |
| SYC-12/13 | 12 | 13 | 6BTA5.9-C180,132kW | 2750 | 4080×1980×2350 |
| SYC-13/13 | 13 | 13 | 6BTA5.9-C180,132kW | 2750 | 3450×1520×2220 |
| SYC-17/7 | 17 | 7 | 6BTA5.9-C180,132kW | 3350 | 3380×1640×2350 |
| SYC-15/13 | 15 | 13 | YC6A240-20,177kW | 3350 | 3380×1650×2500 |
| SYC-16/13 | 16 | 13 | 6CTA8.3-C215,158kW | 3350 | 3980×1800×2450 |
| SYC-13/17 | 13 | 17 | 6CTA8.3-C215,158kW | 3400 | 3780×1980×2350 |
| SYC-17/14.5 | 17 | 14.5 | 6CTA8.3-C260,194kW | 3400 | 3980×1800×2450 |
| SYC-19/14.5 | 19 | 14.5 | 6CTA8.3-C260,194kW | 3400 | 3980×1800×2450 |
| SYC-18/17 | 18 | 17 | 6CTA8.3-C260,194kW | 3400 | 3980×1800×2450 |
| SYC-20/13 | 20 | 13 | 6CTA8.3-C260,194kW | 3400 | 3980×1800×2450 |
| SYC-22/8 | 22 | 8 | 6CTA8.3-C260,194kW | 4000 | 4580×1950×2600 |
| SYC-26/8 | 26 | 8 | 6CTA8.3-C260,194kW | 4000 | 4580×1950×2600 |
| SYC-22/14 | 22 | 14 | 6CTA8.9-C325, 239kW | 4500 | 4580×1950×2600 |
| SYC-27/10 | 27 | 10 | 6CTA8.9-C325, 239kW | 5000 | 4600×1950×2850 |
| SYC-30/10 | 30 | 10 | 6CTA8.9-C325, 240kW | 5000 | 4600×1950×2850 |
| Two Stages Compression Portable Diesel Screw Air Compressor | |||||
| SYC-19.5/19 | 19.5 | 19 | 6CTA8.3-C260,194KW | 3700 | 3650*1800*2500 |
| SYC-22/20 | 22 | 20 | 6LTA8.9-C360,265KW | 4500 | 4600*1950*2850 |
| SYC-26/20 | 26 | 20 | 6LTA8.9-C360,265KW | 4850 | 4600*1950*2850 |
| SYC-27/22 | 27 | 22 | NTA855-P400 | 5000 | 4600*1950*2850 |
| SYC-26/25 | 26 | 25 | QSZ13-C500 | 5100 | 4700*2100*2500 |
| SYC-21/35 | 21 | 35 | QSZ13-C500 | 5100 | 4700*2100*2500 |
| SYC-33/25 | 33 | 25 | QSZ13-C550 | 5200 | 4700*2100*2500 |
| SYC-26/35 | 26 | 35 | QSZ13-C550 | 5200 | 4700*2100*2500 |
Company Profile
After Sales Service
Our service
1.Pre-sale service:
Act as a good adviser and assistant of clients enable them to get rich and generous returns on their investments .
1.Select equipment model.
2.Design and manufacture products according to client’s special requirement ;
2.Services during the sale:
1.Pre-check and accept products ahead of delivery .
2. Help clients to draft solving plans .
3.After-sale services:
Provide considerate services to minimize clients’ worries.
1.Complete After-sales service,professional engineers available to service machinery at home or oversea.
(On-site service requires the customer to bear the cost)
2. 24 hours technical support by e-mail.
3.Other essential technological service.
Other Products
| Lubrication Style: | Lubricated |
|---|---|
| Cooling System: | Air Cooling |
| Power Source: | Diesel Engine |
| Cylinder Position: | Vertical |
| Structure Type: | Closed Type |
| Installation Type: | Movable Type |
| Customization: |
Available
|
|
|---|
How Do You Maintain a Gas Air Compressor?
Maintaining a gas air compressor is essential to ensure its optimal performance, longevity, and safe operation. Regular maintenance helps prevent breakdowns, extends the compressor’s lifespan, and promotes efficient operation. Here are some key maintenance steps for a gas air compressor:
1. Read the Manual:
Before performing any maintenance tasks, thoroughly read the manufacturer’s manual specific to your gas air compressor model. The manual provides important instructions and guidelines for maintenance procedures, including recommended intervals and specific maintenance requirements.
2. Check and Change the Oil:
Gas air compressors typically require regular oil changes to maintain proper lubrication and prevent excessive wear. Check the oil level regularly and change it according to the manufacturer’s recommendations. Use the recommended grade of oil suitable for your compressor model.
3. Inspect and Replace Air Filters:
Inspect the air filters regularly and clean or replace them as needed. Air filters prevent dust, debris, and contaminants from entering the compressor’s internal components. Clogged or dirty filters can restrict airflow and reduce performance. Follow the manufacturer’s guidelines for filter cleaning or replacement.
4. Drain Moisture from the Tank:
Gas air compressors accumulate moisture in the compressed air, which can lead to corrosion and damage to the tank and internal components. Drain the moisture from the tank regularly to prevent excessive moisture buildup. Refer to the manual for instructions on how to properly drain the moisture.
5. Check and Tighten Connections:
Regularly inspect all connections, fittings, and hoses for any signs of leaks or loose connections. Tighten any loose fittings and repair or replace damaged hoses or connectors. Leaks can lead to reduced performance and inefficiency.
6. Inspect Belts and Pulleys:
If your gas air compressor has belts and pulleys, inspect them for wear, tension, and proper alignment. Replace any worn or damaged belts and ensure proper tension to maintain optimal performance.
7. Clean the Exterior and Cooling Fins:
Keep the exterior of the gas air compressor clean from dirt, dust, and debris. Use a soft cloth or brush to clean the surfaces. Additionally, clean the cooling fins regularly to remove any accumulated debris that can impede airflow and cause overheating.
8. Schedule Professional Servicing:
While regular maintenance can be performed by the user, it is also important to schedule professional servicing at recommended intervals. Professional technicians can perform thorough inspections, conduct more complex maintenance tasks, and identify any potential issues that may require attention.
9. Follow Safety Precautions:
When performing maintenance tasks on a gas air compressor, always follow safety precautions outlined in the manual. This may include wearing protective gear, disconnecting the power source, and ensuring proper ventilation in confined spaces.
By following these maintenance steps and adhering to the manufacturer’s guidelines, you can keep your gas air compressor in optimal condition, prolong its lifespan, and ensure safe and efficient operation.
What Is the Role of Air Receivers in Gas Air Compressor Systems?
Air receivers play a crucial role in gas air compressor systems by serving as storage tanks for compressed air. Here’s a detailed explanation:
1. Storage and Stabilization:
The primary function of an air receiver is to store compressed air generated by the gas air compressor. As the compressor produces compressed air, the air receiver collects and stores it. This storage capacity helps meet fluctuating demand in compressed air usage, providing a buffer between the compressor and the system’s air consumption.
By storing compressed air, the air receiver helps stabilize the supply to the system, reducing pressure fluctuations and ensuring a consistent and reliable flow of compressed air. This is particularly important in applications where the demand for compressed air may vary or experience peaks and valleys.
2. Pressure Regulation:
Another role of the air receiver is to assist in pressure regulation within the gas air compressor system. As compressed air enters the receiver, the pressure inside increases. When the pressure reaches a predetermined upper limit, typically set by a pressure switch or regulator, the compressor stops supplying air, and the excess air is stored in the receiver.
Conversely, when the pressure in the system drops below a certain lower limit, the pressure switch or regulator signals the compressor to start, replenishing the compressed air in the receiver and maintaining the desired pressure level. This cycling of the compressor based on pressure levels helps regulate and control the overall system pressure.
3. Condensate Separation:
During the compression process, moisture or condensate can form in the compressed air due to the cooling effect. The air receiver acts as a reservoir that allows the condensate to settle at the bottom, away from the outlet. The receiver often includes a drain valve at the bottom to facilitate the removal of accumulated condensate, preventing it from reaching downstream equipment and causing potential damage or performance issues.
4. Energy Efficiency:
Air receivers contribute to energy efficiency in gas air compressor systems. They help optimize the operation of the compressor by reducing the occurrence of short-cycling, which refers to frequent on-off cycling of the compressor due to rapid pressure changes. Short-cycling can cause excessive wear on the compressor and reduce its overall efficiency.
The presence of an air receiver allows the compressor to operate in longer and more efficient cycles. The compressor runs until the receiver reaches the upper pressure limit, ensuring a more stable and energy-efficient operation.
5. Air Quality Improvement:
Depending on the design, air receivers can also aid in improving air quality in the compressed air system. They provide a space for the compressed air to cool down, allowing moisture and some contaminants to condense and separate from the air. This can be further enhanced with the use of additional filtration and drying equipment installed downstream of the receiver.
In summary, air receivers play a vital role in gas air compressor systems by providing storage capacity, stabilizing compressed air supply, regulating system pressure, separating condensate, improving energy efficiency, and contributing to air quality control. They are an integral component in ensuring the reliable and efficient operation of compressed air systems across various industries and applications.
What Fuels Are Commonly Used in Gas Air Compressors?
Gas air compressors can be powered by various fuels depending on the specific model and design. The choice of fuel depends on factors such as availability, cost, convenience, and environmental considerations. Here’s a detailed explanation of the fuels commonly used in gas air compressors:
1. Gasoline:
Gasoline is a widely used fuel in gas air compressors, particularly in portable models. Gasoline-powered compressors are popular due to the widespread availability of gasoline and the convenience of refueling. Gasoline engines are generally easy to start, and gasoline is relatively affordable in many regions. However, gasoline-powered compressors may emit more exhaust emissions compared to some other fuel options.
2. Diesel:
Diesel fuel is another common choice for gas air compressors, especially in larger industrial models. Diesel engines are known for their efficiency and durability, making them suitable for heavy-duty applications. Diesel fuel is often more cost-effective than gasoline, and diesel-powered compressors typically offer better fuel efficiency and longer runtime. Diesel compressors are commonly used in construction sites, mining operations, and other industrial settings.
3. Natural Gas:
Natural gas is a clean-burning fuel option for gas air compressors. It is a popular choice in areas where natural gas infrastructure is readily available. Natural gas compressors are often used in natural gas processing plants, pipeline operations, and other applications where natural gas is abundant. Natural gas-powered compressors offer lower emissions compared to gasoline or diesel, making them environmentally friendly.
4. Propane:
Propane, also known as liquefied petroleum gas (LPG), is commonly used as a fuel in gas air compressors. Propane-powered compressors are popular in construction, agriculture, and other industries where propane is used for various applications. Propane is stored in portable tanks, making it convenient for use in portable compressors. Propane-powered compressors are known for their clean combustion, low emissions, and easy availability.
5. Biogas:
In specific applications, gas air compressors can be fueled by biogas, which is produced from the decomposition of organic matter such as agricultural waste, food waste, or wastewater. Biogas compressors are used in biogas production facilities, landfills, and other settings where biogas is generated and utilized as a renewable energy source. The use of biogas as a fuel in compressors contributes to sustainability and reduces dependence on fossil fuels.
It’s important to note that the availability and suitability of these fuel options may vary depending on the region, infrastructure, and specific application requirements. When selecting a gas air compressor, it’s crucial to consider the compatibility of the compressor with the available fuel sources and to follow the manufacturer’s guidelines regarding fuel selection, storage, and safety precautions.
editor by CX 2023-09-29
China 12V 4wd Car Air Compressor 150Psi Twin Cylinder NEW brands air compressor 12 v air compressor portable
Model: 124 Spider (348_), 500C / 595C / 695C (312_), cdx
Calendar year: 2016-, 2009-, 2016-
Voltage: 12V, 12V&24V
Automobile Fitment: Abarth, ACURA (GAC)
Max Pressure: a hundred and one-150Psi, 101-150Psi
Dimensions: 25 x ten x 22cm, 39.5*38.5*46.5
Product Variety: Earn-733
Guarantee: 1 Years, 1 Years
Operate: Tire Stress Keep an eye on
Certification: CE & ROHS
Coloration: Silver makes air compressor
Cylinder: 30mm double cylinder air compressor
Air hose: 5m PU hose
Output quantity: 60L/MIN
Wire duration: 3m 10ft
Packaging Information: double cylinder air compressor packing: 6PCS/CTN,carton dimensions:46*35*44cm
Port: HangZhou/ZheJiang
Specification
| item | air compressor 12 v |
| Voltage | 12V |
| Max Pressure | 101-150Psi |
| Size | 25 x ten x 22cm |
| Place of Origin | China |
| ZHangZhoug | |
| Brand Name | WIN |
| Model Amount | WIN-733 |
| Warranty | 1Years |
| Function | Tire Pressure Keep track of |
| Certification | CE & ROHS |
| Voltage | 12V&24V |
| Max Force | 101-150Psi |
| Size | 39.5*38.5*forty six.five |
| Warranty | 1 Several years |
| Color | Silver makes air compressor |
| Cylinder | 30mm double cylinder air compressor |
| Air hose | 5m PU hose |
| Output volume | 60L/MIN |
| Wire size | 3m 10ft |
Choosing an Air Compressor
Considering a new Air Compressor? Here are some tips to make the decision easier. Learn the pros and cons of each type, including the differences between oil-injected and oil-free models, single stage and positive displacement. In addition, learn more about the different technologies that are available for your air compressor. It is important to choose an appropriate unit for the type of work you do. Here are some of the best compressors available today.
Positive displacement
There are several different types of air compressors, but most are positive displacement air compressors. They use a rotary or reciprocating component to compress air. The reciprocating component compresses air by reducing the volume of the chamber. Positive displacement compressors are used in bicycle pumps, chemical plants, and refrigerators. Positive displacement air compressors use multiple inlet ports. Despite the various types, the principle of operation remains the same.
Another type of positive displacement air compressor is a reciprocating piston. The piston inside a cylinder moves up and down, causing the compressed air to fill the upper part of the cylinder. These air compressors are used in a variety of different applications, including blowing bottles and gas pipelines. These air compressors can be water-cooled, lubricated, or non-lubricated. Different types have different capacities and air pressures.
A positive displacement flowmeter uses a rotating chamber that divides continuous fluid into discrete portions. The number of times the chamber is filled and discharged can be used to estimate the flow rate. The rotation speed of the measuring chamber is directly proportional to the flow rate. The drawbacks of this type of positive displacement flowmeter are that it is prone to jamming. If the fluid contains particles, it may be too thick for the meter to determine flow rate.
A negative displacement air compressor was invented in 1860 and is the oldest type of compressor. It uses two lobes positioned in a circular cavity. One rotor is connected to an engine, while the other pushes the other one to spin in the opposite direction. Negative displacement compressors are low-maintenance, but they do require more precision. They are often used in nuclear power plants because they use the kinetic energy of the rotating elements to produce pressure.
Oil-injected
Oil-flooded or oil-injected air compressors use liquid to seal and lubricate moving parts and reduce noise. Oil-flooded air compressors are effective for a variety of pneumatic tools and accessories. Some models have a thermostat that controls the amount of oil used during operation. Other types of oil-flooded air compressors are piston-type models. Here is an overview of the basic differences between these two air compressors.
An oil-injected air compressor is more expensive than a comparable oil-free air compressor, but its advantages far outweigh its disadvantages. An oil-free compressor is quieter, requires less maintenance, and has a lower price tag. It also offers a greater degree of air purity. A number of other advantages may also make this type of air compressor the better choice for many industrial settings. If you need a high-pressure compressor in a tight space, consider the benefits of an oil-free system.
Oil-injected air compressors require more maintenance than oil-free models. Both types of air compressors offer similar capacity and ISO 8573-1 Class 0 and 1-2 purity, but the oil-injected systems require more air-treatment components. They require an activated carbon filter and coalescing filter. Oil-injected air compressors will likely remain the standard for industrial air compressors for many years. And since their performance and efficiency are comparable, it may be worthwhile to invest in some point-of-use air treatment.
Both types of air compressors have their benefits. However, choosing between oil-free and oil-injected air compressors is not as straightforward as you might think. Whichever type you choose, make sure it will meet your needs. The benefits of an oil-injected air compressor outweigh their disadvantages. In general, oil-injected air compressors are more durable and can last longer than oil-free models. The only downside is their higher price.
Oil-free
When choosing an air compressor for your company, you’ll need to determine what it is going to be used for. For example, if you’re planning on using it to power multiple workers, you should consider getting an oil-free compressor. An oil-free compressor, on the other hand, is quieter and can power several workers at a time. If you’re a contractor, the most important consideration will be the type of jobs you’ll be doing. Higher air pressure means greater demand for air flow, and more pressure can damage the equipment.
Oil-free compressed air is certified 100% free of contaminants. Technically, oil-free air is not completely free of foreign matter, but it is extremely low within the limits of practical air quality. A technically oil-free air compressor might have a total oil level of 0.003 mg/m3. If you’re in need of a technically oil-free air compressor, you must install an air treatment equipment after your current compressor.
If you’re in the manufacturing industry, a good oil-free air compressor will save you money and reduce your environmental impact. Many of these tools require air compressors to work, and this equipment will ensure that they don’t get contaminated. To buy the best oil-free compressor, you should learn a bit about the different terms used by compressor repair companies. ACFM, for example, is the amount of air that can be compressed in one minute at rated conditions.
When you’re using an oil-free air compressor, you should know that the overall life of the device will be much shorter. Compared to an oil-flooded rotary screw air compressor, an oil-free compressor typically has a lifespan of 50 thousand hours. But it’s important to understand that this type of compressor can still cause damage to piping and processes. Therefore, you should choose an oil-free compressor when you need to clean air for your business.
Single-stage
A single-stage air compressor, also known as a piston air compressor, compresses air only once before storing it in a cylinder. This stored air has enough energy to power a variety of pneumatic tools, such as screwdrivers, chisels, and wrenches. These units are also ideally suited for low-flow applications and are widely used in gas stations, auto shops, and various manufacturing plants.
A single-stage air compressor uses two valves – one for inlet and one for outlet – to transfer compressed air. Both valves are actuated by springs. The inlet valve has a slight curvature to provide protection from damage. The compressor’s outlet valve opens when the pressure in the cylinder is higher than the pressure in the storage tank. The piston moves very quickly inside the cylinder, exerting a high amount of force throughout the compression process. This high piston speed is a common cause of compressor wear and tear.
A single-stage air compressor is ideal for smaller tradesmen and small construction crews. Its lightweight and compact design make it easier to transport and store. While it may be tempting to buy the first cheap air compressor you see, it’s important to balance the price against performance to choose the right air compressor for your needs. The best single-stage air compressor is one that provides excellent performance and durability. Its two-stage counterpart is designed for larger construction teams and large applications.
The main difference between a single-stage and a two-stage air compressor lies in their capacity. A single-stage air compressor compresses air only once and delivers it into the storage tank, while a two-stage compressor compresses it twice, creating double the pressure. Because of this, single-stage air compressors are cheaper and versatile than their counterparts, which means that they can be used for multiple purposes.
Low-noise
A low-noise air compressor is a type of industrial compressor that is less noisy than regular air compressors. These are generally smaller machines designed for smaller factories and workshops with a few to several employees. They are designed to handle mid-weight volumes of compressed air per day. This type of compressor is especially useful for smaller manufacturing businesses that need to produce compressed air for medical applications. Small breweries can also benefit from the low-noise capabilities of these compressors.
Low-noise air compressors come in various sizes and features. For smaller jobs, you can purchase a one-gallon model that is lightweight and portable. For larger jobs, you can purchase one with a larger tank that can provide more pressure for longer jobs. However, a larger tank will make the compressor heavier and harder to transport. To avoid this, make sure to check the size of the tank and how much power it can handle.
Considering a low-noise air compressor for your business? If so, you’ve come to the right place. There are a variety of affordable and dependable low-noise options to choose from. A CAT 10020C, for example, is designed to provide high-volume air to many outlets at once. A CAT 10020C comes with a 10-gallon tank, wheels, and a carrying handle.
Noise levels can also affect the productivity of employees. When employees work with air compressors in close proximity to each other, they may develop tinnitus. If employees are free from tinnitus because of the loud noise, they are likely to work more efficiently. Moreover, it will be easier for them to focus and communicate efficiently. If you need a compressor, a low-noise one is an excellent choice.
editor by Cx 2023-06-21
China best Viair 444c DC12V 200psi Air Suspension Compressor air compressor for car
Product Description
Product Description
| Product Name | 444C Air Tyre Compressor | |
| Voltage | DC 12V | |
| Max Amperage | 23A | |
| Max Pressure | 300PSI(2.06Mpa) | |
| Max Working Pressure | 200PSI(1.37Mpa) | |
| Max Duty Cycle | 100%@100PSI | |
| Flow Rate | 1.8CFM@0PSI | |
| Metal Hose | Ø14mm*0.5m | |
| Check Valve Threads | 1/4″ | |
| Fill Rate(8L Tank) | 0-120PSI | 1Min. 40Sec |
| 80-120PSI | 40Sec | |
| Main Dimension(LxWxH) | 325*145*225mm | |
| Net Weight(Kgs) |
10.5kgs |
|
Features:
444C is a truly rated, 200 PSI-rated compressor. It features horizontal cooling fins and a trapezoidal head design, a standard 3/8″ stainless steel braided leader hose with 3/8″ NPT inline check valve and insulated wiring.
Included Parts: Installation instructions,Mounting hardware,Vibration isolators,Remote mount air filter assembly,Stainless steel braided leader hose.Check valve.
Other related product:
VU-4F:
Switch Controller with Braided Harness”
solenoid valve:
Air Ride Vehicle Height Sensors(AA-ROT-120)
| Classification: | Variable Capacity |
|---|---|
| Job Classification: | Reciprocating |
| Transmission Power: | Power |
| Cooling Method: | Air-cooled |
| Cylinder Arrangement Mode: | Duplex |
| Cylinder Stage: | Multi Stages |
| Samples: |
US$ 0/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
|
|
|---|
Types of Air Compressors
There are many types of Air Compressors available on the market. Learn which one is right for your needs and what makes one better than another. Find out more about Single-stage models, Oil-free models, and Low-noise models. This article will explain these types and help you decide which one you need. You can also learn about Air Compressors that have single-stage compressors. If you are looking for a high-quality compressor, this article will help you choose a unit.
Air Compressors
Air compressors work by forcing atmospheric air through an inlet valve. As the piston moves down, it pulls atmospheric air into the chamber. As the piston rises, it forces the compressed air out of the cylinder through an exhaust valve. One of the most common types of air compressor is the reciprocating type. Another type of compressor is a single-stage piston. These types of compressors compress air in one stroke – equivalent to the complete rotation of the piston’s crankshaft.
These devices change electrical or mechanical energy into pressurized air. When air is compressed, its volume decreases, increasing its pressure. Air compressors typically have a minimum pressure of 30 bars. The lower pressure band is the range of air pressure. Most compressors are controlled separately, but network controls can be used to interconnect multiple compressors. This type of controller will not work for all types of compressors. There are other types of air compressors that can communicate with each other.
Compressed air has multiple applications in all kinds of industries. In agriculture, it can power pneumatically powered material handling machines for irrigation and crop spraying. Dairy equipments also use compressed air. Compressors are also used in the pharmaceutical industry for mixing tanks, packaging, and conveyor systems. Portable air compressors, which can be powered by diesel fuel, are frequently used at remote drilling sites. Portable air compressors are also commonly used in oil and gas. They can be used to remotely control valves and install reactor rods.
Whether you use an air compressor for agricultural purposes or in a manufacturing setting, there are some features to consider when choosing an air compressor for your needs. A good compressor will have a safety device. It will automatically shut off the input air and output air once sufficient compressing has been achieved. These features will help your air compressor remain efficient and protect your equipment. The safety device is an important feature of any air compressor to increase its overall efficiency.
Vane air compressors are the most common type. They are generally smaller and less powerful than reciprocating piston compressors, so you can use one of these for applications that are under 100 horsepower. The vane air compressors have low compression ratios and high capacities, but they are generally limited to low-power applications. Vane compressors tend to run hot, and they typically have a low compression ratio. It is important to choose the correct oil viscosity for your compressor.
Single-stage models
When comparing single-stage air compressors, look for the term “stages.” Multi-stage compressors use two stages and can handle more capacity and pressure. One stage involves pressurizing air using a piston and a lower-pressure cylinder. This compressed air is then moved to a storage tank. Single-stage models tend to be more energy-efficient than their two-stage counterparts. But if you don’t need a high-pressure cylinder, a single-stage air compressor can be the best choice.
Although single-stage air compressors produce less power, they can produce enough air to power pneumatic tools and other pneumatic equipment. These single-stage units are most useful for smaller-scale home projects and DIY projects. For more industrial purposes, a dual-stage model is the best choice. But if you’re in a hurry, a single-stage unit may be sufficient. Ultimately, it depends on what you plan to do with the air compressor.
Single-stage air compressors feature a single cylinder, one piston stroke for each revolution of pressurized air. Single-stage compressors are typically smaller and more compact, making them a good choice for smaller work environments. Their cfm capacity (cubic feet per minute) is an important indicator of operating capacity. If you plan to use multiple pneumatic tools, you will probably need a higher cfm model. Similarly, the horsepower of single-stage compressors indicates its working capacity. One horsepower moves 550 pounds per foot per minute.
Multi-stage air compressors are generally more expensive and more energy-efficient than single-stage units, but they can offer higher air flow rates. While they may be more complex, they can lower general operating expenses. If you plan on using your air compressor for industrial or commercial use, a dual-stage model might be the best choice. However, if you’re planning to use the air compressor for mass production, a single-stage model may be the best choice.
Single-stage air compressors have the same piston size and number of inlets, while dual-stage models have a smaller first piston and a much longer second piston. Both have a cooling tube in between the two pistons to reduce the air temperature before the second round of compression. The single-stage model is typically small and portable, while the double-stage air compressor is stationary. These compressors can both be stationary and large.
Low-noise models
Despite its name, low-noise models of air compressors are not all the same. The noise level of a compressor can be affected by several factors, including the power source and proximity to the machine. Reciprocal compressors are generally louder than electric ones because of their many moving parts. By contrast, rotary-screw and scroll compressors have fewer moving parts and are quieter.
The noise level of a gas-powered air compressor can be extremely high, making it unsuitable for use indoors. To combat this problem, you can choose an electric model. The noise level of a compressor is primarily caused by motor friction. The cover of a piston is also a major factor in noise, as pistons with minimal covers will produce a lot of noise. Previously, oil was required for a quiet compressor. However, this has changed thanks to the medical industry’s demand for oil-free models.
The CZPT EC28M Quiet Air Compressor is another model that features quiet operation. This air compressor makes 59dB of noise. This level is low enough to allow you to carry on normal conversations while it cycles. In addition, this compressor has an industrial oil-free pump and a 2.8 Amp direct-drive induction motor. These two features make it a great choice for businesses.
Low-noise models of air compressors are available for the construction industry. However, these compressors are not necessarily low-quality, which is why you should consider the noise level of your air tool before purchasing one. The specialists at CZPT can recommend the low-noise models for your particular application and space. Noise can distract people who work near the air compressor. That is why many businesses now opt for these models.
Oil-free models
A number of oil-free models of air compressors are available, but what makes them special? Oil-free compressors don’t contain oil, so they’re lubricated by grease instead. They’re a good choice if you’re working with a small compressor and don’t want to risk damaging it. On the other hand, oil-free models do generate significant amounts of heat, which can damage the compressor. Higher pressure can grind the compressor against itself, or even warp it.
A few words of knowledge can help you choose the best oil-free air compressor for your needs. For example, a compressor’s horsepower is a measurement of how powerful the motor is. Higher horsepower means a higher PSI or ACFM. You can also use the ACFM to compare the two. Scroll technology is a modern air compression system that uses a stationary and mobile spiral. This reduces the volume of air in the compressor by directing it to the center.
Purchasing an oil-free air compressor doesn’t have to be a daunting task, though. A good distributor can advise you on what type of oil-free air compressor is right for you. This way, you can save money and enjoy peace of mind while using your air compressor. And, of course, the best way to get a great deal on an air compressor is to speak to a distributor who is knowledgeable about the products available.
An oil-free air compressor is a great option for businesses that are sensitive to the contamination of air. For example, in the pharmaceutical and food industry, a minuscule oil could spoil a product or even damage production equipment. Oil-free air compressors generally have lower maintenance costs than oil-flooded models because there are fewer moving parts. Because of this, oilless air compressors require fewer maintenance and may still need to be replaced occasionally.
A few advantages of an oil-free air compressor over an oil-lubricated one include lower noise levels. Oil-free air compressors tend to be less noisy and run more quietly than oil-injected ones, but you should still carefully weigh the pros and cons before making a decision. Also, consider how much you use your air compressor before choosing a model. The pros outweigh the cons. In the end, you’ll be glad you chose an oil-free air compressor.
editor by CX 2023-05-23
China supplier LCD Digital Pressure Gauge Mini Air Compressor for Car Tires Air Inflator Pump air compressor portable
Product Description
Product parameter
1.[Fast & Powerful Inflator with a Maximum High Pressure Capacity Up to 150PSI]—-This powerful air compressor has 3 built-in 2200mAh lithium battery. When it is fully charged, it can inflate 3 car tires from 0-2.5bar; 12 Motorcycle tires from 0-2.2bar; 20 bicycle tires from 0-2.1bar; 40 basketballs from 0-0.8bar; more than 30 swimming rings. Approximately 5 min to fully inflate a car tire; 3 min to fully inflate a bicycle tire; 1 min to inflate a ball.
2. [Portable & Rechargeable; Lightweight & Easy to Carry Design for Outdoor Activity]—The handheld CZPT and well-made air pump is designed to be easily carry outdoor, using micro USB type-C port for charging. Made from extremely durable, lightweight plastic, the pump has a sturdy hose which resists high pressures, while allowing for maximum air flow and overheat.
3.[Accurate LCD Digital Pressure Gauge for Tire Detection in 4 unit & Auto Shut Off]—The air compressor gauge can display the pressure accurately in 4 unit( PSI, BAR & KG/CM²). The LCD digital display will accurately display the current tire pressure after connecting the hose to the tire valve, so you can have a real-time tire pressure detection. It will automatically stop inflating when the inflation reaches the preset value which can avoid over inflating
4.[Long-lasting LED Light as Emergency Light or Outdoor Light Source During Dark Night]—This Air pump has 2 LED lighting modes (Bright mode&Flashing mode) for you to use as outdoor lighting source. It is a helpful companion under emergency or daily use. The light can last for 7 hours with fully charged.
5.[Package with Multiple Nozzles ] —4 Additional adapters include needles valve (for basketball, balls)/short cone/long cone adapters (for inflatable kayak, swimming pool accessories, etc).
| After-sales Service: | Reply Within 24 Hours |
|---|---|
| Warranty: | One Year |
| Certification: | CE |
| Battery: | 3.7V/6000mAh |
| Max: | Air Pump 150psi |
| Lighting Function: | Outdoor Lighting and Sos Function |
| Samples: |
US$ 40/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
|
|
|---|
The Air Compressor Is a Versatile Tool
The Air Compressor is one of the most versatile tools in any garage or workshop. It is easy to use and can perform a variety of tasks, from jackhammering to drilling. These machines are available in a wide variety of sizes and types, making it an excellent choice for a variety of situations. With a single motor, you no longer need separate motors for each tool. Its lightweight, compact design makes it easy to handle, and the single motor also reduces wear on parts.
Oil-injected
Oil-injected air compressors require a large amount of lubricant, which needs to be added to the sump regularly to maintain optimum performance. As there are many types of industrial fluids, a well-intentioned maintenance technician may add the wrong lubricant to the compressor. If this happens, the compressor will become incompatible with the lubricant, resulting in excessive carryover and the need to flush and replace downstream air treatment components.
Typically, the G 110-250 oil-injected rotary screw compressor from Atlas Copco provides reliable compressed air, preventing costly downtime. The G110-250 oil-injected rotary screw compressor is highly reliable and durable, enabling it to function in temperatures up to 46degC/115degF. Despite the oil-injected air compressor’s robust design, this unit requires very little on-site installation, and it features simple operation.
The primary advantage of oil-injected air compressors is the reduced cost of running. The cost of oil-free compressors is less than half of that of oil-injected ones, and it will require fewer maintenance costs in the long run. Moreover, the oil-free system is more environmentally friendly than oil-injected air compressors. But the drawbacks of oil-injected air compressors are substantial, too. It can contaminate finished goods and cause a significant financial risk for the manufacturer.
An oil-injected rotary screw air compressor offers several advantages over its counterpart. First, it features an innovative vertical design with variable-speed drive, allowing it to run more efficiently. Second, oil-injected air compressors reduce energy consumption by up to 50% compared to non-oil-injected air compressors. They also have a thermostatic valve, allowing them to maintain an optimum temperature. Thermostatically-regulated oil coolers allow the compressor to run more quietly.
Oil-free
What is an oil-free air compressor? The name refers to a type of air compressor that does not contain oil in the compressor chamber. Oil-free air compressors still use oil for various purposes, including lubricating the moving parts and managing waste heat. However, many people do not realize that their air compressor still requires oil for proper functioning. This article will explore why this type of air compressor is preferable for many users.
First of all, oil-free air technology has many benefits. For one, it reduces the energy cost involved in filtering air, and it minimizes leaks. Moreover, it also reduces the oil costs associated with compressor refills. And finally, it reduces the risks of contamination. Oil-free air technology is the future of compressed air. If you’re looking for an oil-free air compressor, here’s what to look for in your search.
Depending on the purpose of your air compressor, it may be beneficial to invest in an oil-free air compressor. Oil-lubricated air compressors are generally more durable than their oil-free counterparts, but they may cost twice as much. You should still consider the cost of ownership before purchasing an oil-free compressor. The oil-free models can be easier to transport, and they are more powerful. Moreover, they’re quieter than oil-lubed models.
An oil-free air compressor also means less maintenance, as it doesn’t need oil to work. This type of air compressors also features fewer moving parts, which means fewer places for problems to develop. All oil-free air compressors are manufactured to meet ISO Class 0 and 1 air purity standards. They also have less noise and vibration compared to their oil-based counterparts. So, why not choose an oil-free air compressor for your business?
Gasoline
When choosing a gas-powered air compressor, it’s important to consider the advantages of gasoline. This energy source can power a large air compressor without electricity. However, this type of air compressor lacks electrical hookup, so you’ll need to run an extension cord if you need to use it at a distance. However, gas compressors are able to function with just a gas tank. This makes them ideal for medium to heavy-duty industrial applications.
Another important consideration when choosing a gas air compressor is its size. Larger compressors are typically larger than portable ones and require more space. This makes them easier to transport and operate on the go. However, if you’re not sure which type of air compressor is best for you, consider the gas-powered versions. While they may be lighter, they don’t run as smoothly as their electric counterparts. Gasoline-powered compressors are not as portable as their electric counterparts and require proper maintenance.
Electricity
Electricity in an air compressor is not cheap. A 25 HP air compressor runs for ten hours each day, five days a week. The motor in these machines consumes 746 watts per hour. To find out how much electricity the equipment uses, multiply the wattage by the running time. For example, if the compressor runs for three hours, then it will use 1.9 kilowatt hours of electricity. To determine how much electricity an air compressor uses per day, you can calculate the kilowatt hours and multiply the number by the utility rate. Considering this, you can determine the cost of running your air compressor once per month.
The cost of operating an air compressor depends on the type of compressor. Electric air compressors are often silent and can run without any maintenance. These tools can be left unattended for up to four thousand hours before requiring repair. Electric air compressors require higher power for higher pressure, so you should plan accordingly. Whether or not you need a maintenance visit is up to you, but the benefit of not having to spend a fortune on repairs is priceless.
Although compressed air is not an energy-efficient source, its use in a variety of applications may save you money and kilowatts. Since an air compressor uses power when it is running, the cost is lower than the cost of operating a power tool. If you plan to use your air compressor for a long time, make sure that it is maintained properly. Proper care will save you money and power, and you may even be able to get an extended warranty if the compressor breaks down.
Variable frequency drive
The main purpose of a variable frequency drive (VFD) in an air compressor is to reduce energy consumption in the process of compression. A single motor drag system cannot adjust its speed continuously according to the weight of the load. By applying frequency control to the compressor, the power consumption can be reduced while maintaining the same pressure level. Therefore, a VFD is an excellent choice for compressors. Its benefits are numerous.
A VFD can also monitor the temperature of the motor and send error signals if the motor is running too hot or too cold. This eliminates the need for a separate sensor to monitor the oil pressure. These functions are useful not only in lowering energy consumption, but also in improving the performance of an application. Moreover, a VFD can monitor additional variables such as temperature and motor speed. Hence, it is a useful investment.
When using a VFD, it is crucial to choose the right motor. The speed of the compressor should be within the maximum starting limit of the motor. The air tank may be of any size, but a constant pressure limit is required to keep the VFD running within the service factor of the motor. In addition to a VFD, a master controller should also include a remote pressure set point and a PID card for a master controller. The transmitter should incorporate all useful data from the VFD, including the speed and the oil temperature. The VFD must be tested before it is integrated with the master control. It should be tested for min and max speed, temperature, and current within the expected range.
The use of a VFD in an air compressor has many benefits. One of the most notable is the reduction in power consumption. Fixed-speed compressors run on set points of six to seven bar. An extra bar of compression uses 7 percent of energy. This energy is wasted. A VFD-powered air compressor can also increase the life span of compressor parts. It is one of the best investments in your compressor. So, why wait any longer?
editor by CX 2023-05-16
China Air Compressor For Painting Cars 12V Tire Inflator Best Garage Car Tires air compressor lowes
Error:获取返回内容失败，
Your session has expired. Please reauthenticate.
How to Choose the Right Air Compressor
An air compressor uses pressurized air to power a variety of tools. They are most commonly used to power nailers and impact wrenches. Other popular uses for air compressors include paint sprayers and impact wrenches. While all air compressors have the same basic construction, their specialty differs. Ultimately, their differences come down to the amount of air they can push. Read on for information on each type of air compressor. These tools are great for many different purposes, and choosing the right air compressor depends on your specific needs.
Electric motor
While purchasing an electric motor for air compressor, compatibility is a key factor. Not all motors work with the same type of air compressor, so it’s important to check the manufacturer’s instructions before purchasing. By doing this, you can avoid wasting money on an incompatible motor. Another important consideration is speed. A motor’s speed is its rate of rotation, measured in revolutions per minute. It is critical that you purchase a motor with sufficient speed to meet the needs of your air compressor.
Typically, an electric motor for air compressor is 1.5 hp. It is ideal for use with medical equipment and metal-cutting machines. It also performs well under continuous operation and offers a high efficiency and energy-saving performance. Moreover, it features an attractive price, making it a good choice for a wide range of applications. If you are looking for a motor for an air compressor, look no further than a ZYS series.
A motor’s protection class indicates how the motor will operate. Protection classes are specified by the IEC 60034-5. These are stated with two digits and represent the protection against solid objects and water. For example, an IP23 rating means that the motor will be protected from solid objects, while IP54 means that it will protect from dust and water sprayed from all directions. It is vital to choose a motor with the correct protection class for your air compressor.
When choosing an electric motor, you should consider whether it’s compatible with the brand of air compressor. Some may be compatible, while others may require advanced electronics skills to repair. However, most air compressors are covered by warranty, so it’s important to check with the manufacturer if the warranty is still in effect before you spend a dime on a replacement. The motor should be replaced if it has failed to perform as designed.
Oil bath
Air compressors require proper lubrication to function efficiently. The piston must draw air with minimal friction. Depending on their design, air compressors can either be oil-lubricated or oil-free. The former uses oil to reduce piston friction, while the latter splashes it on the cylinder bearings and walls. Such air compressors are commonly known as oil-flooded air compressors. In order to keep their oil baths clean, they are recommended for use in locations with high dust levels.
Start/stop control
An air compressor can be controlled by a start/stop control. This type of control sends a signal to the main motor that activates the compressor when the demand for air falls below a preset limit. This control strategy is effective for smaller air compressors and can be useful for reducing energy costs. Start/stop control is most effective in applications where air pressure does not change frequently and where the compressor is not required to run continuously.
To troubleshoot this problem, you need to check the power supply of your compressor. To check the supply side, use a voltage monitor to determine if power is flowing to the compressor. Ensure that the power supply to the compressor is steady and stable at all times. If it fluctuates, the compressor may not start or stop as expected. If you cannot find the problem with the air compressor power supply, it may be time to replace it.
In addition to the start/stop control, you may want to purchase additional air receivers for your air compressor. These can increase the capacity of air stored and reduce the number of times it starts and stops. Another way to decrease the number of starts per hour is to add more air receivers. Then, you can adjust the control to match your requirements. You can also install a pressure gauge that monitors the compressor’s performance.
Start/stop control for air compressors can be complex, but the basic components are relatively easy to understand. One way to test them is to turn the compressor on or off. It is usually located on the exterior of the motor. If you’re unsure of the location of these components, check the capacitors and make sure that the air compressor is not running while you’re not using it. If it does, try to remove the capacitor.
Variable displacement control is another way to adjust the amount of air flowing into the compressor. By controlling the amount of air, the control can delay the use of additional compressors until more required air is available. In addition to this, the device can also monitor the energy used in the compressor. This control method can result in substantial energy savings. You can even save on the amount of electricity by using variable displacement control. It is essential for efficient compressed air systems.
Variable speed drive
A VFD, or variable frequency drive, is a type of electric motor that adjusts its speed to match the demand for air. It is an efficient way to reduce energy costs and improve system reliability. In fact, studies have shown that a 20% reduction in motor speed can save up to 50% of energy. In addition, a VFD can monitor additional variables such as compressor oil pressure and motor temperature. By eliminating manual checks, a VFD will improve the performance of the application and reduce operating costs.
In addition to reducing energy costs, variable-speed drives also increase productivity. A variable-speed air compressor reduces the risk of system leaks by 30 percent. It also reduces the risk of system leaks by reducing pressure in the system. Because of these advantages, many governments are promoting this technology in their industries. Many even offer incentives to help companies upgrade to variable-speed drives. Therefore, the variable-speed drive can benefit many air compressor installations.
One major benefit of a variable-speed drive is its ability to optimize energy use. Variable frequency drives are able to ramp up and down to match the demand for air. The goal is to optimize the pressure and flow in the system so that the best “dead band” occurs between forty percent and eighty percent of full load. A variable-speed compressor will also increase energy efficiency because of its programmability.
A variable-speed air compressor can also be used to control the amount of air that is compressed by the system. This feature adjusts the frequency of power supplied to the motor based on the demand. If the demand for air is low, the frequency of the motor will reduce to save energy. On the other hand, if there is an excess demand for air, the variable-speed compressor will increase its speed. In addition, this type of air compressor is more efficient than its fixed-speed counterpart.
A VFD has many benefits for compressed air systems. First, it helps stabilize the pressure in the pipe network, thereby reducing the power losses due to upstream pressure. It also helps reduce the power consumption caused by fluctuations in upward pressure. Its benefits are also far-reaching. And as long as the air pressure and air supply is properly sized, a VFD will help optimize the efficiency of compressed air systems.
editor by Cx 2023-05-12
China 10HPaircompressor APCOM Low Noise 7.5KW 40 CFM 40CFM screw air compressor 500 liter with air tank air compressor for car
Error:获取session失败，
Choosing an Air Compressor
Considering a new Air Compressor? Here are some tips to make the decision easier. Learn the pros and cons of each type, including the differences between oil-injected and oil-free models, single stage and positive displacement. In addition, learn more about the different technologies that are available for your air compressor. It is important to choose an appropriate unit for the type of work you do. Here are some of the best compressors available today.
Positive displacement
There are several different types of air compressors, but most are positive displacement air compressors. They use a rotary or reciprocating component to compress air. The reciprocating component compresses air by reducing the volume of the chamber. Positive displacement compressors are used in bicycle pumps, chemical plants, and refrigerators. Positive displacement air compressors use multiple inlet ports. Despite the various types, the principle of operation remains the same.
Another type of positive displacement air compressor is a reciprocating piston. The piston inside a cylinder moves up and down, causing the compressed air to fill the upper part of the cylinder. These air compressors are used in a variety of different applications, including blowing bottles and gas pipelines. These air compressors can be water-cooled, lubricated, or non-lubricated. Different types have different capacities and air pressures.
A positive displacement flowmeter uses a rotating chamber that divides continuous fluid into discrete portions. The number of times the chamber is filled and discharged can be used to estimate the flow rate. The rotation speed of the measuring chamber is directly proportional to the flow rate. The drawbacks of this type of positive displacement flowmeter are that it is prone to jamming. If the fluid contains particles, it may be too thick for the meter to determine flow rate.
A negative displacement air compressor was invented in 1860 and is the oldest type of compressor. It uses two lobes positioned in a circular cavity. One rotor is connected to an engine, while the other pushes the other one to spin in the opposite direction. Negative displacement compressors are low-maintenance, but they do require more precision. They are often used in nuclear power plants because they use the kinetic energy of the rotating elements to produce pressure.
Oil-injected
Oil-flooded or oil-injected air compressors use liquid to seal and lubricate moving parts and reduce noise. Oil-flooded air compressors are effective for a variety of pneumatic tools and accessories. Some models have a thermostat that controls the amount of oil used during operation. Other types of oil-flooded air compressors are piston-type models. Here is an overview of the basic differences between these two air compressors.
An oil-injected air compressor is more expensive than a comparable oil-free air compressor, but its advantages far outweigh its disadvantages. An oil-free compressor is quieter, requires less maintenance, and has a lower price tag. It also offers a greater degree of air purity. A number of other advantages may also make this type of air compressor the better choice for many industrial settings. If you need a high-pressure compressor in a tight space, consider the benefits of an oil-free system.
Oil-injected air compressors require more maintenance than oil-free models. Both types of air compressors offer similar capacity and ISO 8573-1 Class 0 and 1-2 purity, but the oil-injected systems require more air-treatment components. They require an activated carbon filter and coalescing filter. Oil-injected air compressors will likely remain the standard for industrial air compressors for many years. And since their performance and efficiency are comparable, it may be worthwhile to invest in some point-of-use air treatment.
Both types of air compressors have their benefits. However, choosing between oil-free and oil-injected air compressors is not as straightforward as you might think. Whichever type you choose, make sure it will meet your needs. The benefits of an oil-injected air compressor outweigh their disadvantages. In general, oil-injected air compressors are more durable and can last longer than oil-free models. The only downside is their higher price.
Oil-free
When choosing an air compressor for your company, you’ll need to determine what it is going to be used for. For example, if you’re planning on using it to power multiple workers, you should consider getting an oil-free compressor. An oil-free compressor, on the other hand, is quieter and can power several workers at a time. If you’re a contractor, the most important consideration will be the type of jobs you’ll be doing. Higher air pressure means greater demand for air flow, and more pressure can damage the equipment.
Oil-free compressed air is certified 100% free of contaminants. Technically, oil-free air is not completely free of foreign matter, but it is extremely low within the limits of practical air quality. A technically oil-free air compressor might have a total oil level of 0.003 mg/m3. If you’re in need of a technically oil-free air compressor, you must install an air treatment equipment after your current compressor.
If you’re in the manufacturing industry, a good oil-free air compressor will save you money and reduce your environmental impact. Many of these tools require air compressors to work, and this equipment will ensure that they don’t get contaminated. To buy the best oil-free compressor, you should learn a bit about the different terms used by compressor repair companies. ACFM, for example, is the amount of air that can be compressed in one minute at rated conditions.
When you’re using an oil-free air compressor, you should know that the overall life of the device will be much shorter. Compared to an oil-flooded rotary screw air compressor, an oil-free compressor typically has a lifespan of 50 thousand hours. But it’s important to understand that this type of compressor can still cause damage to piping and processes. Therefore, you should choose an oil-free compressor when you need to clean air for your business.
Single-stage
A single-stage air compressor, also known as a piston air compressor, compresses air only once before storing it in a cylinder. This stored air has enough energy to power a variety of pneumatic tools, such as screwdrivers, chisels, and wrenches. These units are also ideally suited for low-flow applications and are widely used in gas stations, auto shops, and various manufacturing plants.
A single-stage air compressor uses two valves – one for inlet and one for outlet – to transfer compressed air. Both valves are actuated by springs. The inlet valve has a slight curvature to provide protection from damage. The compressor’s outlet valve opens when the pressure in the cylinder is higher than the pressure in the storage tank. The piston moves very quickly inside the cylinder, exerting a high amount of force throughout the compression process. This high piston speed is a common cause of compressor wear and tear.
A single-stage air compressor is ideal for smaller tradesmen and small construction crews. Its lightweight and compact design make it easier to transport and store. While it may be tempting to buy the first cheap air compressor you see, it’s important to balance the price against performance to choose the right air compressor for your needs. The best single-stage air compressor is one that provides excellent performance and durability. Its two-stage counterpart is designed for larger construction teams and large applications.
The main difference between a single-stage and a two-stage air compressor lies in their capacity. A single-stage air compressor compresses air only once and delivers it into the storage tank, while a two-stage compressor compresses it twice, creating double the pressure. Because of this, single-stage air compressors are cheaper and versatile than their counterparts, which means that they can be used for multiple purposes.
Low-noise
A low-noise air compressor is a type of industrial compressor that is less noisy than regular air compressors. These are generally smaller machines designed for smaller factories and workshops with a few to several employees. They are designed to handle mid-weight volumes of compressed air per day. This type of compressor is especially useful for smaller manufacturing businesses that need to produce compressed air for medical applications. Small breweries can also benefit from the low-noise capabilities of these compressors.
Low-noise air compressors come in various sizes and features. For smaller jobs, you can purchase a one-gallon model that is lightweight and portable. For larger jobs, you can purchase one with a larger tank that can provide more pressure for longer jobs. However, a larger tank will make the compressor heavier and harder to transport. To avoid this, make sure to check the size of the tank and how much power it can handle.
Considering a low-noise air compressor for your business? If so, you’ve come to the right place. There are a variety of affordable and dependable low-noise options to choose from. A CAT 10020C, for example, is designed to provide high-volume air to many outlets at once. A CAT 10020C comes with a 10-gallon tank, wheels, and a carrying handle.
Noise levels can also affect the productivity of employees. When employees work with air compressors in close proximity to each other, they may develop tinnitus. If employees are free from tinnitus because of the loud noise, they are likely to work more efficiently. Moreover, it will be easier for them to focus and communicate efficiently. If you need a compressor, a low-noise one is an excellent choice.
editor by CX 2023-04-27
China 12V Fast inflation Car Inflator Portable Pressure Digital Compressor Inflator Suitable for all types of cars air pump air compressor oil
Yr: Common
Model: Common
Voltage: 12V
Auto Fitment: Common
Max Pressure: one zero one-150Psi
Dimension: 26*15.8*8.3cm
Design Quantity: X-1266
Warranty: Months
Purpose: Unexpected emergency Gentle, Electrical power Indicator, Tire Strain Keep track of
Max responsibility sycle: twelve minutes
Rated present: 10A
Wire length: 2.8M
DC power: 120w
gas tube: .7m
Packaging Particulars: bag lowering gearbox equipment reduction motor with flange simpler combination sourcing. Shoulder chance for you, and let us offer with hundreds of factories, conserving your income & Time.two. Q: could you offer samples to us for examining the top quality just before generating buy?A: Of course, We can offer you samples. The freight and sample price are gather.3. Q: Do you have right after-sale support?A: Sure. Considering that we are inclined to create a lengthy-expression partnership with our customers, we will follow all our orders and deal with the difficulties which could happen until finally our clients are pleased with it.4. Q: Can we use our brand in the items?A: Yes, we provide OEM items.five. Q:what providers can we offer?Approved Shipping Conditions: FOB,CFR,CIF, 1045# steel high good quality motorcycle sprocket for Honda of materials c45 carbon steel sprocket bike sprocket 428 15t EXW；Accepted Payment Forex:USD,EUR,CNYAccepted Payment Variety: T/T,L/C,D/P D/A,PayPal,Cash Sprocket Rimdrive Sprocketsprocket Section For Mini Excavator And Bulldozer Language Spoken:English,Chinese
A Buyer’s Guide to Air Compressor Types
There are many types of Air Compressors, and it’s important to understand what each type has to offer. In this article, we’ll discuss single stage air compressors, low-noise compressors, and models with two pistons. But, before you buy an Air Compressor, be sure to read our buyer’s guide to the various types. This way, you’ll have all of the information you need to make the right decision for your business.
Single-stage air compressors
A single-stage air compressor is an excellent choice for most general-purpose purposes. They provide enough power to operate pneumatic tools, and they produce less heat. Single-stage air compressors, however, are not suitable for heavy-duty industrial uses. However, they can be used in various applications, including auto shops, gas stations, and various manufacturing facilities. They are also suitable for borewells and other high-pressure places.
These air compressors are a great choice for home use and are suitable for small-scale businesses, contractors, and small shops. These compressors have continuous duty cycles, cast iron compressor pumps, and a minimum 5,000-hour pump life. They also feature advanced features, including ODP motors, Auto Start & Controls, Receiver tanks, and power cords. They have low maintenance and can save you a great deal of money.
Single-stage air compressors are generally less expensive and lighter than their two-stage counterparts. Single-stage air compressors are also more portable, which is a plus for small projects. While two-stage compressors offer higher CFM, they are more powerful and bulky, making them unsuitable for small or home use. So it is essential to determine what you will use the air compressor for and decide on a model based on your needs.
A single-stage air compressor is made of a piston and a tank. The piston moves rapidly inside the cylinder and exerts pressure on the cylinder. This means that the piston can’t move any faster than the air pressure outside the cylinder. The piston is designed to operate in the same way for each stage. This is a great choice for home shops and one-man automotive shops, as it allows you to control the pressure without sacrificing the pump’s life.
Single-stage air compressors are often cheaper than two-stage versions, but they are not the best choice for every application. If you are only using your air compressor occasionally, you’ll find a one-stage model to be much more reliable than a two-stage model. The main difference between the two types of compressors is in the amount of air that each stage compresses. A two-stage air compressor will have more air storage capacity, but it will still produce more pressure.
Rotary vane compressors
Rotary vane compressors use a centrifugal pump to compress air. The rotor is set eccentrically in the housing, which almost touches the vane. As the rotor turns, the air that enters the pump is trapped between the vanes. This compressed air undergoes compression as the rotor rotates. Vanes are small pieces of carbon fiber or graphite composite. Vanes may be made of different materials depending on the application.
While rotary vane pumps are not commonly used to produce compressed air, they are widely used in automotive and hydraulic applications. Chances are, you have used a rotary vane pump at some point in your life. These pumps are also common in the vacuum and compressed air industries. As a result, many people don’t realize that they’re still around. They feature slots that allow the vanes to slide in and out of the rotor.
A rotary vane compressor has a drum and rotor inside. The rotor is eccentrically positioned and has slots and grooves on its surface. Its inlet and outlet ports are situated off-center, allowing the vanes to be pushed out by centrifugal force. Because the rotor rotates so quickly, air is trapped between the vanes. This air then becomes pressurized by the rotating rotor.
Rotating vane compressors can be easily serviced and repaired. A simple replacement of carbon vanes requires just 15 minutes and common tools. The carbon vanes typically last nine to eighteen months, depending on system operating pressure. Before purchasing a rotary vane compressor, make sure to check whether it has been properly performance-tested and has a warranty. Generally, warranties cover the rotor/stator chambers but do not cover the vanes or air filters. You should also check if the unit is covered by a lightning or water damage warranty.
Rotary vane compressors are an integral part of manufacturing industries. Many pharmaceutical manufacturing facilities depend on rotary vane compressors to control their equipment. Other industries that use rotary vane compressors include the plastics, woodworking, natural gas, and medical & dental fields. Their benefits are numerous and far outweigh any disadvantages of rotary screw compressors. For example, a rotary vane compressor can double the life of a conventional compressor.
Rotary vane compressors with low-noise models
If you are looking for a rotary vane air compressor, you have come to the right place. CZPT’s LV Series rotary vane compressors offer low-noise models, compact size, and robust integration. In addition to their low-noise features, they feature large filter systems to deliver high-quality compressed air. The LV Series models also feature CZPT’s reputation for reliability and quality.
This type of compressor uses centrifugal force to operate and is limited in its top and minimum operating speeds. They are only a third as powerful as screw compressors, and their top speed limits are much lower. Furthermore, the vanes wear out easily at high speeds because there is not enough centrifugal force to seal them against the cylinder’s edges. Even at half their full capacity, they consume as much as 80% of their total energy rating.
Because piston compressors produce a lot of noise, factory owners and shop owners have begun to install noise-dampening cabinets and other solutions. But, rotary vane compressors produce far less noise than a traditional vacuum, and the maintenance costs are also low. Rotary vane compressors are also extremely helpful in several industries. They are used in the automotive and auto finishing industries, as well as in dairy industries and milking machines.
If you have a deep pond, a rotary vane air compressor kit can pump up to 20 feet of water. This is more than enough airflow for two to five diffusers. A 1/4 HP rotary vane kit pumps around 4.2 CFM. It also helps to increase circulation and oxygen levels in the pond. Finally, a 1/4 HP kit offers the necessary power to clean up the bottom of a pond.
The rotary vane and rotary screw are the most popular air compressors today. While they are similar in many ways, they are more versatile and durable than their counterparts. They use fewer angular contact ball bearings and require less frequent maintenance than piston air compressors. Compared to piston air compressors, rotary vane and rotary screw compressors are quieter and are less expensive.
Rotary vane compressors with two pistons
The rotary vane and rotary screw compressors are similar in application, but both have different advantages and disadvantages. This article will compare the benefits of each and highlight the differences between them. While both are commonly used in industrial applications, rotary vane compressors are preferred by many industries. These compressors also have a wide range of uses, ranging from automotive air tool operation to milking machines. These compressors also have the advantage of being quieter than piston-powered ones.
The current common rail position may not be suitable for pressure swirl injectors, but new positions have been tested and show improvements in specific energy values. Moreover, the current position is not required for external oil pumps. However, mass induction and expulsion have to be performed with utmost care. This article focuses on the design and efficiency of rotary vane compressors. You can find more information about this new design in the references mentioned below.
The advantages of this type of compressor are its low cost, compact size, and easy maintenance. Hence, they are preferred in low capacity applications. Moreover, they feature integrated vanes. The rotating vanes close the air gap and compress air towards the outlet. Compared to piston-powered compressors, these units are cheaper and more reliable. Therefore, you should choose one with the lowest price tag. You can also opt for rotary vane compressors that are oil-free.
Sliding vane compressors are another popular variant. They have a single cylinder connected to the compressor and are capable of operating at low speeds. This design also reduces the amount of friction and maintains volumetric efficiency. However, the sliding vane compressors suffer from high frictional losses. If you are looking for a more efficient rotary compressor, this is the best option. While sliding vane compressors have been in the spotlight for over a century, they are still quite young.
These compressors are easy to install and maintain. They are also quieter than piston compressors. They are also cheaper than piston-driven compressors. The energy efficiency and low price make them the perfect choice for any commercial or industrial application. If you’re looking for a small, compact compressor, the rotary vane has been proven to be the best choice for your needs. You should know that it has a long service life.
editor by CX 2023-04-24
China wholesaler Air Dryer / Combined Air Dryer / Air Cooled Refrigerated Combined Air Dryer Compressor for Sale air compressor for car
Product Description
Air Dryer / Combined air dryer / Air cooled refrigerated combined air dryer compressor for sale
Detailed Photos
(1) Air-cooled combined dryer
Technological Process of the Combined Low Dew Point Compressed Air Dryer
| Symbol | Name | Symbol | Name |
| 1 | Refrigerant Compressor | 15 | Air Pressure Gauge |
| 2 | Oil Separator | 16 | Heat Exchanger |
| 3 | Condenser | 17 | Pressure Relief Valve |
| 4 | Dryer Filter | 18,19 | Check Valve |
| 5 | Sight Lens | 20,21 | Check Valve(Heat Type) |
| 6 | Bulge Thermal Expansion Valve | 22,23,24,25 | Pneumatic Valve |
| 7 | Hot Gas Bypass Valve | 26,29,30,33 | Diffuser |
| 8 | Vaporizer | 27,31 | Air Pressure Gauge |
| 9 | Humidity Sensor | 28,32 | Adsorption Vessel |
| 10 | Evaporator | 34,35,36,37 | Pilot Solenoid Valve |
| 11 | Refrigerant Low Pressure Gauge |
38 | Muffler |
| 12 | Refrigerant Low Pressure Gauge |
39 | Flow Regulating Valve(Heatless Type) |
| 13 | High and Low Pressure Controller | 40 | Throttling Orifice Plate(Heat Type) |
| 14 | Gas Liquid Separator | 41 | Electical Heater(Heat Type) |
General Introduction:
Commonly, there are 2 kinds of compressed air dryer: refrigerated compressed air dryer and regeneration adsorption one. The refrigerated compressed air dryer is quite energy-saving without any air loss, While it is limited by the dew point temperature. The regeneration adsorption compressed air dryer can reach a quiet low dew point, but it has the shortcoming of big air loss and high energy consumption.
The CZPT combined low dew point compressed air dryer takes the maximum advantages of the above 2 kinds of dryers through reasonable pipeline connection and capacity matching, which ensure its economic operation and high quality of low dew point finished air.
Operating Principle:
Firstly, the hot and wet compressed air from the compressor is heat exchange with dried cold compressed air in the heat exchanger. Then it will be cooled down to about 2ºC by evaporator. Under this pressure dew point, the majority of vapor water in the compressed air is eliminated and discharged. After these processes, the low temperature air goes into the heat exchanger to cool the high wet compressed air, at the same time, itself temperature goes up in order to prevent the condensation of dew on the surface of pipelines. Last, low moisture compressed air dryer goes into the adsorption vessel to be further dried in order to get the good dew point.
(2) Water-Cooled Combined Type Air Dryer
Working condition and technical data
Maximum inlet air temperature:45ºC
Ambient temperature range:5-50ºC
Pressure range:0.6-1.0Mpa
Pressure dew point:-20ºC ~ -40ºC
Regeneration gas consumption:3-5%
Cooling mode: water cooling (industrial circulating cooling water)
Cooling water pressure range: 0.2-0.4mpa
Maximum cooling water inlet temperature: 38 ºC
Intake oil content: ≤ 0.1ppm
Power supply: 6-12nm 3 / min: AC 220 V / 50 Hz
15nm3 / min and above: AC 380V / 220V / 50Hz
Cycle: T = 40 (min)
Refrigerant: R22 (R407C / R134a optional)
Design condition: inlet temperature: 38 ºC
Ambient temperature: 38 ºC
Working pressure: 0.7MPa
Cooling water inlet temperature: 32 ºC
Pressure loss: ≤ 5% of design pressure
Note: the water-cooled equipment above 80 cubic CZPT are split bare machines. Other special requirements are welcome to customize.
Product features
- Low dew point:The combined low dew point dryer can reach very low pressure dew point, which can reach below – 40 ºC in general, and – 70 ºC at least according to different user requirements;
- Low energy consumption: the regeneration gas consumption of combined low dew point dryer is only 3% – 5%, which greatly saves the compressed air consumption;
- It can provide compressed air with different dew points for different air consumption points;
- All the operation switches and display instruments of the combined low dew point compressed air dryer are concentrated on the panel of the box plate. The refrigeration type compressed air dryer and the adsorption regeneration compressed air dryer can operate independently or simultaneously with cold and suction according to the customer’s needs;
- The gas-liquid separator adopts the patented three-stage separation mode: direct collision separation + low-speed centrifugal separation + stainless steel wire mesh demisting separation. 99.9% of liquid water is separated from the cooled compressed air. The second evaporation of textile moisture can ensure the low dew point quality of finished gas.
- High quality switching valve, stable and reliable, can ensure the integrity of the working process and prolong the working life of components.
- The refrigeration compressor adopts CZPT of Denmark, CZPT of ZheJiang , CZPT of Japan, CZPT of Germany, CZPT of Germany, CZPT of France and other companies of fully closed or semi closed refrigeration compressor, which has stable operation, low noise, high cop, reliable performance and long power saving life;
Product Parameters
(1) Air-Cooled Combined Type Air Dryer specification
|
Model |
Air capacity (Nm3/min) |
Desiccant weight(kg) | Air connector dia | Refrigerant power (HP) |
Air flow (Nm3/h) |
Fan power(W) | Voltage (V) |
Dryer Net Weight (kg) |
Length(mm) | Wideth(mm) | Height(mm) |
| SDZF-1 | 1.2 | 25 | G1″ | 1/2 | 745 | 1×50 | 220 | 400 | 1080 | 850 | 1460 |
| SDZF-2 | 2.5 | 40 | G1″ | 1/2 | 745 | 1×50 | 220 | 440 | 1100 | 900 | 2050 |
| SDZF-3 | 3.6 | 60 | G1″ | 3/4 | 1330 | 1×100 | 220 | 460 | 1200 | 1000 | 1808 |
| SDZF-4.5 | 5 | 85 | G1 1/2″ | 1 | 2670 | 1×135 | 220 | 660 | 1290 | 1030 | 2263 |
| SDZF-6 | 6.8 | 105 | G1 1/2″ | 1.5 | 4500 | 1×230 | 220 | 775 | 1500 | 1105 | 1931 |
| SDZF-8 | 8.5 | 150 | G2″ | 2 | 5340 | 2×135 | 220 | 970 | 1500 | 1240 | 2016 |
| SDZF-10 | 10.9 | 185 | G2″ | 2.5 | 5340 | 2×135 | 220 | 1120 | 1500 | 1240 | 2316 |
| SDZF-12 | 12.8 | 185 | G2″ | 2.5 | 5340 | 2×135 | 220 | 1120 | 1500 | 1240 | 2316 |
| SDZF-15 | 16 | 310 | DN65 | 3 | 7600 | 2×190 | 380/220 | 1700 | 1960 | 1450 | 2342 |
| SDZF-20 | 22 | 395 | DN65 | 4 | 7600 | 2×190 | 380/220 | 1800 | 1980 | 1600 | 2408 |
| SDZF-25 | 26.8 | 492 | DN80 | 5 | 9000 | 2×230 | 380/220 | 2100 | 2270 | 1700 | 2460 |
| SDZF-30 | 32 | 600 | DN80 | 6 | 9000 | 2×230 | 380/220 | 2300 | 2420 | 1780 | 2506 |
| SDZF-40 | 43.5 | 725 | DN100 | 7 | 12500 | 2×420 | 380/220 | 2700 | 2100 | 2340 | 2673 |
| SDZF-50 | 53 | 855 | DN100 | 10 | 13500 | 3×230 | 380/220 | 2900 | 2100 | 2390 | 2687 |
| SDZF-60 | 67 | 1005 | DN125 | 12 | 18750 | 3×420 | 380/220 | 3350 | 2250 | 2600 | 2814 |
| SDZF-80 | 90 | 1335 | DN125 | 13.3 | 25000 | 4×420 | 380/220 | 4200 | 2640 | 2600 | 2866 |
Note:Design conditions: working pressure: 7bar, inlet temperature: 38ºC, pressure dew point: -20ºC
(2) Water-Cooled Combined Type Air Dryer
Product specifications
| model | Air capacity (Nm3/min) |
Weight of desiccant(kg) | Air nozzle diameter | Diameter of cooling water pipe | Cooling power (HP) |
Cooling water flow (Nm3/h) |
Voltage (V) |
Equipment weight (kg) |
L(mm) | W(mm) | H(mm) |
| SDZW-6 | 6.8 | 105 | G1 1/2″ | R1″ | 1.5 | 1.2 | 220 | 760 | 1500 | 1160 | 1940 |
| SDZW-8 | 8.5 | 150 | G2″ | R1″ | 2 | 1.2 | 220 | 960 | 1500 | 1100 | 2016 |
| SDZW-10 | 10.9 | 185 | G2″ | R1″ | 2.5 | 1.6 | 220 | 1120 | 1500 | 1240 | 2316 |
| SDZW-12 | 12.8 | 185 | G2″ | R1″ | 2.5 | 1.8 | 220 | 1150 | 1500 | 1240 | 2316 |
| SDZW-15 | 16 | 275 | DN65 | R1″ | 3 | 2 | 380/220 | 1660 | 1960 | 1450 | 2196 |
| SDZW-20 | 22 | 395 | DN65 | R1 1/2″ | 4 | 3 | 380/220 | 1740 | 1970 | 1600 | 2475 |
| SDZW-25 | 26.8 | 495 | DN80 | R1 1/2″ | 5 | 3.6 | 380/220 | 2075 | 2030 | 1630 | 2505 |
| SDZW-30 | 32 | 605 | DN80 | R1 1/2″ | 6 | 4.6 | 380/220 | 2200 | 2240 | 1840 | 2519 |
| SDZW-40 | 43.5 | 725 | DN100 | R1 1/2″ | 7 | 5.6 | 380/220 | 2784 | 2360 | 1900 | 2637 |
| SDZW-50 | 53 | 860 | DN100 | R1 1/2″ | 10 | 7.2 | 380/220 | 3144 | 2400 | 2000 | 2638 |
| SDZW-60 | 67 | 1005 | DN125 | R1 1/2″ | 12 | 9.2 | 380/220 | 3361 | 2540 | 2100 | 2719 |
| SDZW-80 | 90 | 1335 | DN125 | R1 1/2″ | 13.3 | 10.8 | 380/220 | 4500 | 2640 | 2450 | 2818 |
| SDZW-100 | 110 | 2155 | DN150 | R1 1/2″ | 20 | 12.4 | 380/220 | 6550 | 2680 | 2670 | 2985 |
| SDZW-120 | 130 | 2650 | DN150 | R2″ | 25 | 14.6 | 380/220 | 7810 | 2820 | 2800 | 3041 |
| SDZW-150 | 160 | 3205 | DN200 | R2″ | 25 | 16.2 | 380/220 | 8500 | 3290 | 3130 | 3190 |
| SDZW-200 | 210 | 3825 | DN200 | R2 1/2″ | 40 | 18.6 | 380/220 | 9600 | 3350 | 3375 | 3309 |
| SDZW-250 | 260 | 5260 | DN250 | R2 1/2″ | 60 | 24.4 | 380/220 | Detailed parameters and consultation with manufacturers | |||
| SDZW-300 | 315 | 6160 | DN250 | R3″ | 70 | 30.5 | 380/220 | Detailed parameters and consultation with manufacturers | |||
Optional Accessories
- Micro heat type
- Dew point display
- Dew point energy saving control
- Special voltage
- Environmental refrigerant
- – 70 ºC dew point
- Not limited to this
Company Profile
Certifications
Packaging & Shipping
FAQ
| After-sales Service: | Ok |
|---|---|
| Warranty: | 1 Year |
| Flow: | Cross Flow |
| Material Status: | Bulk |
| Drying Medium: | Air |
| Structure: | All Kinds |
| Samples: |
US$ 1000/Set
1 Set(Min.Order) | |
|---|
| Customization: |
Available
|
|
|---|
Types of Air Compressors
There are many types of Air Compressors available on the market. Learn which one is right for your needs and what makes one better than another. Find out more about Single-stage models, Oil-free models, and Low-noise models. This article will explain these types and help you decide which one you need. You can also learn about Air Compressors that have single-stage compressors. If you are looking for a high-quality compressor, this article will help you choose a unit.
Air Compressors
Air compressors work by forcing atmospheric air through an inlet valve. As the piston moves down, it pulls atmospheric air into the chamber. As the piston rises, it forces the compressed air out of the cylinder through an exhaust valve. One of the most common types of air compressor is the reciprocating type. Another type of compressor is a single-stage piston. These types of compressors compress air in one stroke – equivalent to the complete rotation of the piston’s crankshaft.
These devices change electrical or mechanical energy into pressurized air. When air is compressed, its volume decreases, increasing its pressure. Air compressors typically have a minimum pressure of 30 bars. The lower pressure band is the range of air pressure. Most compressors are controlled separately, but network controls can be used to interconnect multiple compressors. This type of controller will not work for all types of compressors. There are other types of air compressors that can communicate with each other.
Compressed air has multiple applications in all kinds of industries. In agriculture, it can power pneumatically powered material handling machines for irrigation and crop spraying. Dairy equipments also use compressed air. Compressors are also used in the pharmaceutical industry for mixing tanks, packaging, and conveyor systems. Portable air compressors, which can be powered by diesel fuel, are frequently used at remote drilling sites. Portable air compressors are also commonly used in oil and gas. They can be used to remotely control valves and install reactor rods.
Whether you use an air compressor for agricultural purposes or in a manufacturing setting, there are some features to consider when choosing an air compressor for your needs. A good compressor will have a safety device. It will automatically shut off the input air and output air once sufficient compressing has been achieved. These features will help your air compressor remain efficient and protect your equipment. The safety device is an important feature of any air compressor to increase its overall efficiency.
Vane air compressors are the most common type. They are generally smaller and less powerful than reciprocating piston compressors, so you can use one of these for applications that are under 100 horsepower. The vane air compressors have low compression ratios and high capacities, but they are generally limited to low-power applications. Vane compressors tend to run hot, and they typically have a low compression ratio. It is important to choose the correct oil viscosity for your compressor.
Single-stage models
When comparing single-stage air compressors, look for the term “stages.” Multi-stage compressors use two stages and can handle more capacity and pressure. One stage involves pressurizing air using a piston and a lower-pressure cylinder. This compressed air is then moved to a storage tank. Single-stage models tend to be more energy-efficient than their two-stage counterparts. But if you don’t need a high-pressure cylinder, a single-stage air compressor can be the best choice.
Although single-stage air compressors produce less power, they can produce enough air to power pneumatic tools and other pneumatic equipment. These single-stage units are most useful for smaller-scale home projects and DIY projects. For more industrial purposes, a dual-stage model is the best choice. But if you’re in a hurry, a single-stage unit may be sufficient. Ultimately, it depends on what you plan to do with the air compressor.
Single-stage air compressors feature a single cylinder, one piston stroke for each revolution of pressurized air. Single-stage compressors are typically smaller and more compact, making them a good choice for smaller work environments. Their cfm capacity (cubic feet per minute) is an important indicator of operating capacity. If you plan to use multiple pneumatic tools, you will probably need a higher cfm model. Similarly, the horsepower of single-stage compressors indicates its working capacity. One horsepower moves 550 pounds per foot per minute.
Multi-stage air compressors are generally more expensive and more energy-efficient than single-stage units, but they can offer higher air flow rates. While they may be more complex, they can lower general operating expenses. If you plan on using your air compressor for industrial or commercial use, a dual-stage model might be the best choice. However, if you’re planning to use the air compressor for mass production, a single-stage model may be the best choice.
Single-stage air compressors have the same piston size and number of inlets, while dual-stage models have a smaller first piston and a much longer second piston. Both have a cooling tube in between the two pistons to reduce the air temperature before the second round of compression. The single-stage model is typically small and portable, while the double-stage air compressor is stationary. These compressors can both be stationary and large.
Low-noise models
Despite its name, low-noise models of air compressors are not all the same. The noise level of a compressor can be affected by several factors, including the power source and proximity to the machine. Reciprocal compressors are generally louder than electric ones because of their many moving parts. By contrast, rotary-screw and scroll compressors have fewer moving parts and are quieter.
The noise level of a gas-powered air compressor can be extremely high, making it unsuitable for use indoors. To combat this problem, you can choose an electric model. The noise level of a compressor is primarily caused by motor friction. The cover of a piston is also a major factor in noise, as pistons with minimal covers will produce a lot of noise. Previously, oil was required for a quiet compressor. However, this has changed thanks to the medical industry’s demand for oil-free models.
The CZPT EC28M Quiet Air Compressor is another model that features quiet operation. This air compressor makes 59dB of noise. This level is low enough to allow you to carry on normal conversations while it cycles. In addition, this compressor has an industrial oil-free pump and a 2.8 Amp direct-drive induction motor. These two features make it a great choice for businesses.
Low-noise models of air compressors are available for the construction industry. However, these compressors are not necessarily low-quality, which is why you should consider the noise level of your air tool before purchasing one. The specialists at CZPT can recommend the low-noise models for your particular application and space. Noise can distract people who work near the air compressor. That is why many businesses now opt for these models.
Oil-free models
A number of oil-free models of air compressors are available, but what makes them special? Oil-free compressors don’t contain oil, so they’re lubricated by grease instead. They’re a good choice if you’re working with a small compressor and don’t want to risk damaging it. On the other hand, oil-free models do generate significant amounts of heat, which can damage the compressor. Higher pressure can grind the compressor against itself, or even warp it.
A few words of knowledge can help you choose the best oil-free air compressor for your needs. For example, a compressor’s horsepower is a measurement of how powerful the motor is. Higher horsepower means a higher PSI or ACFM. You can also use the ACFM to compare the two. Scroll technology is a modern air compression system that uses a stationary and mobile spiral. This reduces the volume of air in the compressor by directing it to the center.
Purchasing an oil-free air compressor doesn’t have to be a daunting task, though. A good distributor can advise you on what type of oil-free air compressor is right for you. This way, you can save money and enjoy peace of mind while using your air compressor. And, of course, the best way to get a great deal on an air compressor is to speak to a distributor who is knowledgeable about the products available.
An oil-free air compressor is a great option for businesses that are sensitive to the contamination of air. For example, in the pharmaceutical and food industry, a minuscule oil could spoil a product or even damage production equipment. Oil-free air compressors generally have lower maintenance costs than oil-flooded models because there are fewer moving parts. Because of this, oilless air compressors require fewer maintenance and may still need to be replaced occasionally.
A few advantages of an oil-free air compressor over an oil-lubricated one include lower noise levels. Oil-free air compressors tend to be less noisy and run more quietly than oil-injected ones, but you should still carefully weigh the pros and cons before making a decision. Also, consider how much you use your air compressor before choosing a model. The pros outweigh the cons. In the end, you’ll be glad you chose an oil-free air compressor.
editor by CX 2023-04-22
China 200psi Suspension 480C Air Compressor 12V air ride suspension for car with Great quality
OE NO.:
Reference NO.: 30137, BS1333,, 2830038
Guarantee: 1 12 months
Kind: THREAD
Auto Model: All auto
Item name:: 480c Compressor Air Trip Suspension
Model:: 480C
Certificate:: ISO9001:2008
OEM:: OEM Support
Operating strain:: 200psi
Check out valve:: 3/8 or 1/4
Port: HangZhou
Functions:1. 12 VOLT – 200PSI Max Functioning Pressure, motor must be managing throughout use.2.1.76 CFM Free Circulation @ PSI3. Hard mount device with weighty duty wire for long term set up.4.Contains: Stainless steel braided hose, Inline check out valve to eliminate substantial amperage restarts, vibration isolator, and distant air filter alternative.5.Unique design and style cylinder head.6.Use thread sealant for appropriate installation. Thread tape is not advised. Properly sealed, advised torque is 12 to fifteen feet lbs
| Product Name | Portable Air Compressor | ||
| Voltage | DC 12V | ||
| Max Amperage | 23A | ||
| Max Stress | 300PSI(2.06Mpa) | ||
| Max Doing work Strain | 200PSI(1.37Mpa) | ||
| Max Duty Cycle | 100%@100PSI | ||
| Flow Price | 1.8CFM@0PSI | ||
| Metal Hose | Ø14mm*.5m | ||
| Check Valve Threads | 1/4″G, Gravity Conveyor Rollers Milled Shaft Roller Steel Roller For Conveyor Line 1/4”NPT,3/8”G,3/8”NPT | ||
| Fill Rate(8L Tank) | 0-120PSI | 1Min. 40Sec | |
| 80-120PSI | 40Sec | ||
| Main Dimension(LxWxH) | 325*145*225mm | ||
| Net Bodyweight(Kgs) | 6.0kgs | ||
Choosing an Air Compressor
Considering a new Air Compressor? Here are some tips to make the decision easier. Learn the pros and cons of each type, including the differences between oil-injected and oil-free models, single stage and positive displacement. In addition, learn more about the different technologies that are available for your air compressor. It is important to choose an appropriate unit for the type of work you do. Here are some of the best compressors available today.
Positive displacement
There are several different types of air compressors, but most are positive displacement air compressors. They use a rotary or reciprocating component to compress air. The reciprocating component compresses air by reducing the volume of the chamber. Positive displacement compressors are used in bicycle pumps, chemical plants, and refrigerators. Positive displacement air compressors use multiple inlet ports. Despite the various types, the principle of operation remains the same.
Another type of positive displacement air compressor is a reciprocating piston. The piston inside a cylinder moves up and down, causing the compressed air to fill the upper part of the cylinder. These air compressors are used in a variety of different applications, including blowing bottles and gas pipelines. These air compressors can be water-cooled, lubricated, or non-lubricated. Different types have different capacities and air pressures.
A positive displacement flowmeter uses a rotating chamber that divides continuous fluid into discrete portions. The number of times the chamber is filled and discharged can be used to estimate the flow rate. The rotation speed of the measuring chamber is directly proportional to the flow rate. The drawbacks of this type of positive displacement flowmeter are that it is prone to jamming. If the fluid contains particles, it may be too thick for the meter to determine flow rate.
A negative displacement air compressor was invented in 1860 and is the oldest type of compressor. It uses two lobes positioned in a circular cavity. One rotor is connected to an engine, while the other pushes the other one to spin in the opposite direction. Negative displacement compressors are low-maintenance, but they do require more precision. They are often used in nuclear power plants because they use the kinetic energy of the rotating elements to produce pressure.
Oil-injected
Oil-flooded or oil-injected air compressors use liquid to seal and lubricate moving parts and reduce noise. Oil-flooded air compressors are effective for a variety of pneumatic tools and accessories. Some models have a thermostat that controls the amount of oil used during operation. Other types of oil-flooded air compressors are piston-type models. Here is an overview of the basic differences between these two air compressors.
An oil-injected air compressor is more expensive than a comparable oil-free air compressor, but its advantages far outweigh its disadvantages. An oil-free compressor is quieter, requires less maintenance, and has a lower price tag. It also offers a greater degree of air purity. A number of other advantages may also make this type of air compressor the better choice for many industrial settings. If you need a high-pressure compressor in a tight space, consider the benefits of an oil-free system.
Oil-injected air compressors require more maintenance than oil-free models. Both types of air compressors offer similar capacity and ISO 8573-1 Class 0 and 1-2 purity, but the oil-injected systems require more air-treatment components. They require an activated carbon filter and coalescing filter. Oil-injected air compressors will likely remain the standard for industrial air compressors for many years. And since their performance and efficiency are comparable, it may be worthwhile to invest in some point-of-use air treatment.
Both types of air compressors have their benefits. However, choosing between oil-free and oil-injected air compressors is not as straightforward as you might think. Whichever type you choose, make sure it will meet your needs. The benefits of an oil-injected air compressor outweigh their disadvantages. In general, oil-injected air compressors are more durable and can last longer than oil-free models. The only downside is their higher price.
Oil-free
When choosing an air compressor for your company, you’ll need to determine what it is going to be used for. For example, if you’re planning on using it to power multiple workers, you should consider getting an oil-free compressor. An oil-free compressor, on the other hand, is quieter and can power several workers at a time. If you’re a contractor, the most important consideration will be the type of jobs you’ll be doing. Higher air pressure means greater demand for air flow, and more pressure can damage the equipment.
Oil-free compressed air is certified 100% free of contaminants. Technically, oil-free air is not completely free of foreign matter, but it is extremely low within the limits of practical air quality. A technically oil-free air compressor might have a total oil level of 0.003 mg/m3. If you’re in need of a technically oil-free air compressor, you must install an air treatment equipment after your current compressor.
If you’re in the manufacturing industry, a good oil-free air compressor will save you money and reduce your environmental impact. Many of these tools require air compressors to work, and this equipment will ensure that they don’t get contaminated. To buy the best oil-free compressor, you should learn a bit about the different terms used by compressor repair companies. ACFM, for example, is the amount of air that can be compressed in one minute at rated conditions.
When you’re using an oil-free air compressor, you should know that the overall life of the device will be much shorter. Compared to an oil-flooded rotary screw air compressor, an oil-free compressor typically has a lifespan of 50 thousand hours. But it’s important to understand that this type of compressor can still cause damage to piping and processes. Therefore, you should choose an oil-free compressor when you need to clean air for your business.
Single-stage
A single-stage air compressor, also known as a piston air compressor, compresses air only once before storing it in a cylinder. This stored air has enough energy to power a variety of pneumatic tools, such as screwdrivers, chisels, and wrenches. These units are also ideally suited for low-flow applications and are widely used in gas stations, auto shops, and various manufacturing plants.
A single-stage air compressor uses two valves – one for inlet and one for outlet – to transfer compressed air. Both valves are actuated by springs. The inlet valve has a slight curvature to provide protection from damage. The compressor’s outlet valve opens when the pressure in the cylinder is higher than the pressure in the storage tank. The piston moves very quickly inside the cylinder, exerting a high amount of force throughout the compression process. This high piston speed is a common cause of compressor wear and tear.
A single-stage air compressor is ideal for smaller tradesmen and small construction crews. Its lightweight and compact design make it easier to transport and store. While it may be tempting to buy the first cheap air compressor you see, it’s important to balance the price against performance to choose the right air compressor for your needs. The best single-stage air compressor is one that provides excellent performance and durability. Its two-stage counterpart is designed for larger construction teams and large applications.
The main difference between a single-stage and a two-stage air compressor lies in their capacity. A single-stage air compressor compresses air only once and delivers it into the storage tank, while a two-stage compressor compresses it twice, creating double the pressure. Because of this, single-stage air compressors are cheaper and versatile than their counterparts, which means that they can be used for multiple purposes.
Low-noise
A low-noise air compressor is a type of industrial compressor that is less noisy than regular air compressors. These are generally smaller machines designed for smaller factories and workshops with a few to several employees. They are designed to handle mid-weight volumes of compressed air per day. This type of compressor is especially useful for smaller manufacturing businesses that need to produce compressed air for medical applications. Small breweries can also benefit from the low-noise capabilities of these compressors.
Low-noise air compressors come in various sizes and features. For smaller jobs, you can purchase a one-gallon model that is lightweight and portable. For larger jobs, you can purchase one with a larger tank that can provide more pressure for longer jobs. However, a larger tank will make the compressor heavier and harder to transport. To avoid this, make sure to check the size of the tank and how much power it can handle.
Considering a low-noise air compressor for your business? If so, you’ve come to the right place. There are a variety of affordable and dependable low-noise options to choose from. A CAT 10020C, for example, is designed to provide high-volume air to many outlets at once. A CAT 10020C comes with a 10-gallon tank, wheels, and a carrying handle.
Noise levels can also affect the productivity of employees. When employees work with air compressors in close proximity to each other, they may develop tinnitus. If employees are free from tinnitus because of the loud noise, they are likely to work more efficiently. Moreover, it will be easier for them to focus and communicate efficiently. If you need a compressor, a low-noise one is an excellent choice.
editor by CX 2023-04-21