China wholesaler Energy Save Oil Free Silent Electric Air Compressor 22kw 8bar for Spray Painting air compressor for sale

Product Description

Energy Save Oil Free Silent Electric Air Compressor 22kw 8bar for Spray Painting

Technical Parameters Of PM Variable speed screw air compressor:

Model Work pressure Capacity Power Noise Inlet and outlet diameters of cooling water Water inlet & outlet
Lubricating water
Dimensions Weight Air outlet diameter


WZS-06PMA 0.8 0.3~0.78 5.5 57 3/4″ 1.5 10 800x800x1100 460 3/4″
1.0 0.2~0.65
WZS-08PMA 0.8 0.35~1.17 7.5 57 3/4″ 2 10 800x800x1100 510 3/4″
1.0 0.3~1.05
1.25 0.24~0.81
WZS-11PMA 0.8 0.54~1.72 11 60 1″ 2.5 26 1200x800x1300 620 3/4″
1.0 0.45~1.42
1.25 0.35~1.10
WZS-15PMA 0.8 0.75~2.43 15 60 1″ 3.5 26 1200x800x1300 670 1″
1.0 0.65~2.17
1.25 0.6~1.85
WZS-18PMA 0.8 0.9~3.13 18.5 63 1″ 4 30 1400x1000x1520 730 1″
1.0 0.9~2.82
1.25 0.6~2.05
WZS-22PMA 0.8 1.1~3.62 22 63 1 1/2″ 5 30 1400x1000x1520 780 1″
1.0 0.97~3.21
1.25 0.85~2.78
WZS-30PMA 0.8 1.55~5.12 30 66 1 1/2″ 7 40 1500x1150x1500 1150 1 1/2″
1.0 1.255~4.43
1.25 1.1~3.63
WZS-37PMA 0.8 1.91~6.30 37 66 1 1/2″ 9 40 1500x1150x1500 1200 1 1/2″
1.0 1.60~5.33
1.25 1.42~4.77
WZS-45PMA 0.8 2.50~8.30 45 68 1 1/2″ 10 90 1800x1300x1750 1490 2″
1.0 1.91~6.30
1.25 1.70~5.56
WZS-55PMA 0.8 3.0~9.76 55 69 1 1/2″ 12 100 1800x1300x1750 1570 2″
1.0 2.60~8.55
1.25 2.30~7.67
WZS-75PMA 0.8 3.95~13.00 75 72 1 1/2″ 18 100 1800x1300x1750 1750 2″
1.0 3.40~11.50
1.25 3.0~9.70
WZS-90PMA 0.8 5.0~16.60 90 73 1 1/2″ 20 120 2200x1550x1800 2450 2 1/2″
1.0 4.30~14.66
1.25 3.72~12.60
WZS-110PMA 0.8 6.0~19.97 110 77 1 1/2″ 24 120 2200x1550x1800 2580 2 1/2″
1.0 5.0~16.66
1.25 4.65~15.56
WZS-132PMA 0.8 6.75~22.52 132 77 2″ 30 120 2200x1550x1800 2700 2 1/2″
1.0 6.0~19.97
1.25 5.07~16.90
WZS-160PMA 0.8 8.5~28.11 160 79 3″ 35 160 3000x1800x2100 3900 3″
1.0 706~25.45
1.25 6.7~22.52
WZS-185PMA 0.8 10~33.97 185 79 3″ 38 160 3000x1800x2100 4050 3″
1.0 8.72~29.00
1.25 7075~25.210
WZS-200PMA 0.8 11.2~36.75 200 80 4″ 42 200 3100x1850x2100 4200 4″
1.0 9.68~32.78
1.25 9.2~29.24
WZS-220PMA 0.8 12.2~39.67 220 80 4″ 47 200 3100x1850x2100 4400 4″
1.0 11.2~36.75
1.25 9.0~29.63
WZS-250PMA 0.8 13.5~44.78 250 80 4″ 53 200 3100x1850x2100 4800 4″
1.0 12.3~39.67
1.25 10.2~33.97


Before quotation:
1.Before quoting, what should users offer?
1).Discharge pressure (Bar, Mpa or Psi)
2).Air discharge/Air flow/Air capacity (m3/min or CFM)
3).Power supply (220/380V, 50/60Hz, 3Phase)

2.If I don’t know the pressure and air flow, what should I do?
1).Take the picture of nameplate, we will advise the suitable air compressor to you.
2).Tell us what industry you are, we can advise the suitable 1 (so as to air tank / air dryer / air filters).

High Efficiency PM Motor and Energy Saving
*With the high-performance permanent magnet material, PM motor won’t lose magnetism even under 120°c and can run for more than 15 years.
*No motor bearing: permanent magnet rotors is installed directly on the stretch out shaft of Male rotor. This structure doesn’t have the bearing and eliminates the motor bearing fault. 
*Comparing to normal variable speed motor, the permanent magnet synchronous motor performs with even better energy efficiency. Especially in the low-speed condition, it can still maintain a high motor efficiency.

Delivery: time 5-25 working days after payment receipt confirmed(based on actual quantity)
packing:standard export packing. or customized packing as your
Professional: goods shipping forwarder.

Q: OEM/ODM, or customers logo printed is available?
Yes, OEM/ODM, customers logo is welcomed.

Q:  Delivery date?
Usually 5-25 workdays after receiving deposit, specific delivery date based on order quantity

Q: what’s your payment terms?
Regularly doing 30% deposit and 70% balance by T/T, Western Union, Paypal, other payment terms also can be discussed based on our cooperation.

Q: How to control your quality?
We have professional QC team, control the quality during the mass production and inspect completely goods before shipping.

Q:  If we don’t have shipping forwarder in China, would you do this for us?
We can offer you best shipping line to ensure you can get the goods timely at best price.

Q: come to China before, can you be my guide in China?
We are happy to provide you orservice, such as booking ticket, pick up at the airport, booking hotel, accompany visiting market or factory

After-sales Service: Video Technical Support
Warranty: Unit 1 Year, Air End 2 Years
Lubrication Style: Oil-free
Cooling System: Air Cooling
Power Source: AC Power
Cylinder Position: Vertical


air compressor

How Do Water-Lubricated Air Compressors Impact Compressed Air Quality?

Water-lubricated air compressors can have an impact on the quality of the compressed air they produce. Here’s a detailed explanation of how water-lubricated air compressors can affect compressed air quality:

Moisture Content:

  • Condensation: Water-lubricated compressors introduce moisture into the compressed air system. During the compression process, as the air cools downstream, moisture can condense and accumulate. This moisture can lead to issues such as corrosion, rust, and contamination of downstream equipment or processes.
  • Water Carryover: If the compressor’s water separation mechanisms are not efficient or if there are malfunctions in the water removal systems, water droplets or mist may carry over into the compressed air. This can negatively impact the quality of the compressed air and introduce moisture-related issues downstream.


  • Oil Contamination: In some water-lubricated compressors, there is a potential for oil to mix with the water used for lubrication. If oil and water emulsify or if there are leaks in the compressor system, oil contamination may occur. Oil-contaminated compressed air can have adverse effects on downstream processes, equipment, and products. It can lead to contamination, reduced performance of pneumatic components, and potential health and safety concerns.
  • Particulate Contamination: Water-lubricated compressors can introduce particulate matter, such as sediment, debris, or rust, into the compressed air system. This can occur if the water supply or water treatment systems are not adequately filtered or maintained. Particulate contamination can clog or damage pneumatic equipment, affect product quality, and cause operational issues in downstream applications.

Preventive Measures:

  • Water Separation: Water-lubricated compressors employ various water separation mechanisms to remove moisture from the compressed air. This includes moisture separators, water traps, or coalescing filters that are specifically designed to capture and remove water droplets or mist from the compressed air stream. Regular maintenance and inspection of these separation systems are necessary to ensure their proper functioning.
  • Air Treatment: Additional air treatment components, such as air dryers or desiccant systems, can be installed downstream of water-lubricated compressors to further reduce moisture content in the compressed air. These systems help to remove moisture that may have carried over from the compressor and ensure that the compressed air meets the required dryness standards for specific applications.
  • Proper Maintenance: Regular maintenance of water-lubricated compressors is essential to minimize the potential impact on compressed air quality. This includes routine inspection, cleaning, and replacement of filters, lubrication systems, and water separation components. Addressing any leaks, malfunctioning components, or system issues promptly can help maintain the integrity of the compressed air and prevent contamination or excessive moisture levels.

By implementing appropriate water separation mechanisms, air treatment systems, and maintenance practices, the impact of water-lubricated air compressors on compressed air quality can be minimized. It is important to consider the specific requirements of the application and follow industry standards and guidelines to ensure the desired compressed air quality is achieved.

air compressor

Are There Any Restrictions on the Type of Water Used in Water-Lubricated Compressors?

When it comes to water-lubricated compressors, there are certain restrictions and considerations regarding the type of water that can be used. Here’s a detailed explanation of the restrictions on the type of water used in water-lubricated compressors:

Water Quality:

  • Cleanliness: The water used in water-lubricated compressors should be clean and free from excessive impurities or contaminants. Impurities like sediment, minerals, or debris can cause blockages, wear, or damage to the compressor components. It is important to use water that meets the cleanliness requirements specified by the manufacturer.
  • Chemical Composition: The chemical composition of the water can also be a factor to consider. Water with high mineral content or hardness can lead to scale formation, which can affect the performance and lifespan of the compressor. Water treatment methods, such as water softening or filtration, may be necessary to maintain the desired water quality.

Water Temperature:

  • Freezing Point: In cold climates, it is important to ensure that the water used in the compressor’s lubrication system does not freeze. Freezing can cause operational issues and damage to the equipment. The water temperature should be maintained above freezing point through insulation, heating, or other suitable methods.
  • Temperature Range: Water-lubricated compressors may have specific temperature requirements to ensure optimal operation and lubrication. Operating the compressor with water temperatures outside the recommended range can affect its performance and lifespan. It is important to adhere to the manufacturer’s guidelines regarding the acceptable temperature range for the water used.

Water Treatment:

  • Water Treatment Systems: Depending on the quality of the available water supply, it may be necessary to use water treatment systems to ensure the water meets the required standards. Water treatment systems can help remove impurities, control chemical composition, and maintain the desired water quality for effective lubrication and cooling.
  • Water Treatment Frequency: Regular maintenance and monitoring of the water treatment systems are essential to ensure their effectiveness. The frequency of water treatment, such as filtration or chemical treatment, may vary depending on the specific conditions and the water quality in the area.

Manufacturer Recommendations:

  • Consulting the Manufacturer: It is important to consult the manufacturer’s guidelines and recommendations regarding the type of water to be used in water-lubricated compressors. Manufacturers may specify the acceptable water quality parameters, treatment methods, or restrictions to ensure optimal performance and longevity of the compressor.

By considering the cleanliness, chemical composition, temperature, and appropriate water treatment measures, the type of water used in water-lubricated compressors can be optimized to meet the requirements specified by the manufacturer. Adhering to these restrictions helps ensure efficient and reliable operation of the compressor while minimizing the risk of component damage or performance issues.

air compressor

What is a water lubrication air compressor?

A water lubrication air compressor, also known as a water-injected air compressor, is a type of compressor that utilizes water as a lubricant and cooling medium in its operation. Unlike traditional air compressors that rely on oil for lubrication, water lubrication air compressors offer specific advantages and are commonly used in certain applications. Here’s an overview of how water lubrication air compressors work and their key characteristics:

Working Principle:

In a water lubrication air compressor, the compression process involves injecting a controlled amount of water into the compression chamber. The water acts as a lubricant and cooling agent, ensuring smooth operation and preventing excessive heat buildup. As the air is compressed, the water lubricates the internal components, reducing friction and wear.


1. Reduced Environmental Impact: One of the significant advantages of water lubrication air compressors is their reduced environmental impact. These compressors eliminate the need for oil lubrication, resulting in lower oil consumption and the elimination of oil-related contamination risks. This makes them a more environmentally friendly option, particularly in applications where oil contamination must be avoided, such as in food processing or pharmaceutical industries.

2. Enhanced Air Quality: Water lubrication air compressors produce cleaner compressed air compared to oil-lubricated compressors. The absence of oil in the compression process eliminates the risk of oil carryover into the air system. This is essential in applications where clean and oil-free compressed air is required, such as in electronics manufacturing or spray painting.

3. Improved Energy Efficiency: Water lubrication air compressors can offer improved energy efficiency compared to oil-lubricated compressors. The water injected during the compression process helps in cooling the air, reducing the energy required for subsequent cooling and drying processes. This can lead to energy savings and lower operating costs.

4. Lower Maintenance Requirements: Water lubrication air compressors generally have lower maintenance requirements compared to oil-lubricated compressors. The absence of oil means no oil changes or oil filter replacements, simplifying maintenance tasks and reducing costs. However, regular checks and maintenance of the water filtration system are necessary to ensure the water quality and prevent any potential contamination issues.


Water lubrication air compressors are commonly used in applications where clean and oil-free compressed air is critical. Some typical applications include:

  • Food and beverage processing
  • Pharmaceutical manufacturing
  • Electronics manufacturing
  • Spray painting and coating
  • Laboratories and research facilities
  • Dental offices

These compressors provide a reliable and environmentally friendly solution for industries and applications that require high-quality compressed air without oil contamination.

China wholesaler Energy Save Oil Free Silent Electric Air Compressor 22kw 8bar for Spray Painting   air compressor for saleChina wholesaler Energy Save Oil Free Silent Electric Air Compressor 22kw 8bar for Spray Painting   air compressor for sale
editor by CX 2023-11-20