Medium-Pressure Oil-Free Water-Lubricated PM VSD Screw Air Compressor
Medium-Pressure Oil-Free Water-Lubricated PM VSD Screw Air Compressor
The oil-free water-lubricated screw air compressor uses purified water for lubrication, sealing, and cooling instead of lubricating oil. It delivers clean compressed air, low-noise operation, reduced maintenance requirements, and efficient near-isothermal compression for demanding industrial applications.
- 100% Oil-Free Air – No lubricating oil is used in the compression chamber, helping eliminate oil contamination risks in sensitive production environments.
- Ultra-Quiet Operation – Water-film damping reduces vibration and operating noise, with typical noise levels of approximately 60–75 dB(A).
- Up to 15% Energy Savings – Continuous water cooling supports near-isothermal compression and reduces compression temperature, helping lower power consumption compared with conventional dry oil-free compressors.
- Simplified Maintenance – Routine maintenance mainly involves replacing the air filter and water filter element, without oil filters, lubricants, or oil-gas separators.
- Lower Maintenance Costs – Fewer consumables and wear components help reduce servicing expenses and planned downtime.
- Extended Air End Service Life – Lower operating temperatures reduce thermal stress and mechanical wear, helping extend the service life of the compressor air end.
- Reliable Continuous Operation – A simplified system design reduces potential failure points and supports stable, continuous industrial operation.
- Water Lubrication, Sealing & Cooling – Purified water lubricates the rotors, improves internal sealing, and continuously removes compression heat.
- Eco-Friendly Operation – No lubricating oil means no waste oil disposal, reducing environmental impact and maintenance complexity.
- Suitable for Clean Air Applications – Designed for industries where compressed-air purity is critical, including pharmaceutical, food, electronics, medical, and precision manufacturing applications.
| Model | Rated Pressure （MPa） | FAD （m3/min） | Motor Power （kw） | Dimension （mm） | Weight （kg） | Outlet size mm | Noise db(A)±2 | Lwbrcating Water Quantity L | Cooling Water T/H |
|---|---|---|---|---|---|---|---|---|---|
| NXMY-055V | 2 | 6.5 | 55 | 2750x1450x1650 | 2250 | DN32 | 65 | 135 | 11 |
| 3 | 5.5 | ||||||||
| 4 | 4.5 | ||||||||
| NXMY-075V | 2 | 8.6 | 75 | 2750x1450x1650 | 2350 | DN32 | 68 | 184 | 15 |
| 3 | 7.6 | ||||||||
| 4 | 6.5 | ||||||||
| NXMY-090V | 2 | 10.5 | 90 | 3200x1500x1700 | 3500 | DN40 | 70 | 221 | 18 |
| 3 | 9.5 | ||||||||
| 4 | 8.2 | ||||||||
| NXMY-110V | 2 | 14.5 | 110 | 3200x1500x1700 | 4200 | DN50 | 75 | 270 | 22 |
| 3 | 12.5 | ||||||||
| 4 | 11 | ||||||||
| NXMY-132V | 2 | 17.6 | 132 | 3200x1500x1700 | 4650 | DN50 | 75 | 324 | 27 |
| 3 | 14.5 | ||||||||
| 4 | 13.3 | ||||||||
| NXMY-160V | 2 | 21.5 | 160 | 3500x2050x2360 | 5100 | DN65 | 78 | 393 | 33 |
| 3 | 17.5 | ||||||||
| 4 | 14.5 | ||||||||
| NXMY-185V | 2 | 24.5 | 185 | 3500x2050x2360 | 5600 | DN65 | 78 | 454 | 38 |
| 3 | 20 | ||||||||
| 4 | 17 | ||||||||
| NXMY-200V | 2 | 27 | 200 | 3500x2050x2360 | 6050 | DN65 | 78 | 491 | 41 |
| 3 | 21.6 | ||||||||
| 4 | 18 | ||||||||
| NXMY-220V | 2 | 29.2 | 220 | 3500x2050x2360 | 6325 | DN65 | 80 | 540 | 45 |
| 3 | 23.8 | ||||||||
| 4 | 22 | ||||||||
| NXMY-250V | 2 | 33.5 | 280 | 4300x1950x1980 | 6800 | DN80 | 80 | 614 | 51 |
| 3 | 28.5 | ||||||||
| 4 | 24 | ||||||||
| NXMY-280V | 2 | 37.2 | 250 | 4900x2050x2100 | 6980 | DN100 | 82 | 688 | 57 |
| 3 | 30.5 | ||||||||
| 4 | 28.7 | ||||||||
| NXMY-315V | 2 | 42.8 | 315 | 4900x2050x2100 | 7100 | DN100 | 85 | 774 | 65 |
| 3 | 35.6 | ||||||||
| 4 | 32 | ||||||||
| NXMY-355V | 2 | 48.5 | 355 | 4900x2050x2100 | 7250 | DN125 | 85 | 872 | 73 |
| 3 | 40.6 | ||||||||
| 4 | 35.5 | ||||||||
| NXMY-400V | 2 | 54.5 | 400 | 5100x2150x2100 | 7500 | DN125 | 85 | 982 | 82 |
| 3 | 46.5 | ||||||||
| 4 | 40 | ||||||||
| NXMY-450V | 2 | 60.5 | 450 | 5100x2150x2100 | 7600 | DN125 | 85 | 1105 | 92 |
| 3 | 52.6 | ||||||||
| 4 | 45 |
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Looking for the Best Compressed Air Solution for your industry?
● Share your requirements for expert evaluation (multilingual support).
● Develop customized solution, considering options such as IP level, air end and parts, screen language, remote control, appearance, voltage and temperature adaptation, etc.
● Start production after order confirmation (standard production time: 20-25 days).
● Conduct rigorous quality testing before shipping.
● Lifelong technical support, original maintenance parts support, and up to 10-year warranty on the air end.
Frequently Asked Questions
1. How does an oil-free water-lubricated screw air compressor work?
The compressor injects purified water into the compression chamber, where it performs lubrication, sealing, and cooling functions. The water reduces rotor friction, minimizes internal air leakage, and absorbs compression heat to support efficient, low-temperature operation.
2. Is the compressed air completely oil-free?
No lubricating oil is used inside the compression chamber, which greatly reduces the risk of oil contamination in the compressed air. This makes the compressor suitable for applications requiring very clean air, such as pharmaceuticals, food processing, electronics, and medical manufacturing.
3. What maintenance does a water-lubricated air compressor require?
Routine maintenance is relatively simple and typically focuses on replacing the air filter and water filter element. Because the system does not rely on lubricating oil, it eliminates many oil-related consumables such as oil filters, synthetic lubricants, and oil-gas separators.
