25~40 bar Oil-Free Water-Lubricated Rotary Screw Air Compressor for PET & Industry

A 25–40 bar oil-free water-lubricated rotary screw air compressor is an industrial compressed air system that utilizes water as a sealing and lubricating medium instead of oil.

  • Working Pressure:25~40[ bar ]362.5~580[ psig ]
  • Free Air Delivery:706[ cfm ]20[ m3/min ]
  • Working Power:250[ kw ]350[ hp ]

Product Details

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Product features

  • 100% Oil-Free & Pure Air
    Class 0 certified, eliminating any risk of oil contamination. Ideal for sensitive industries like food, medical, and electronics.

  • Water Lubrication Technology
    Uses clean water instead of oil for cooling and sealing, making it environmentally friendly and reducing operational hazards.

  • High Pressure Output (25–40 bar)
    Delivers stable, high-pressure air perfect for demanding applications such as PET bottle blowing, industrial gas boosting, and high-pressure cleaning.

  • Energy Efficient
    Optimized screw profile and water lubrication reduce friction, leading to lower power consumption compared to traditional high-pressure compressors.

  • Low Maintenance & Cost-Effective
    No oil filters or separators to replace; no oil disposal costs. Water is easily drained and replaced, significantly cutting maintenance time and expense.

  • Eco-Friendly & Sustainable
    Zero oil waste, lower carbon footprint, and compliant with green manufacturing standards.

  • Quiet & Reliable Operation
    Advanced rotary screw technology ensures smooth, quiet performance with long service life, even in continuous 24/7 operation.

  • Compact & Modular Design
    Space-saving footprint with easy integration into existing production lines.

Technical Parameters

ModelVolume
flow
(m³/min)
Motor
power
(kW)

Maximum
working
pressure
(bar)
Noise
(DB)
Cooling water
inlet/outlet
diameter
(In,Out)
Cooling water
volume≤
intale
temperature
(T/h)
Lubricating
water
volume
(L)
Dimension
L*W*H
(mm)
Weight
(kg)
Air outlet
pipe
diameter
RWH-52A/W
RWH-59A/W
RWH-67A/W
5.0 22+30
22+37
22+45
25
30
40
70 DN5015 70 2400*1650*15901450
1550
1650
DN25
RWH-67A/W
RWH-75A/W
RWH-85A/W
6.0 30+37
30+45
30+55
25
30
40
70 DN5018 70 2400*1650*15901750
1850
1950
DN25
RWH-82A/W
RWH-92A/W
RWH-120A/W
8.0 37+45
37+55
45+75
25
30
40
73 DN6520 160 3200*2050*19002300
2400
2500
DN32
RWH-100A/W
RWH-120A/W
RWH-135A/W
10.0 45+55
45+75
45+90
25
30
40
73 DN6526 160 3200*2050*19002450
2550
2700
DN32
RWH-130A/W
RWH-145A/W
RWH-165A/W
12.0 55+75
55+90
55+110
25
30
40
78 DN6536 220 3200*2050*19002650
2800
2900
DN32
RWH-150A/W
RWH-165A/W
RWH-185A/W
14.0 75+75
75+90
75+110
25
30
40
78 DN6542 200 3200*2050*19002800
2900
3000
DN32
RWH-165A/W
RWH-185A/W
RWH-207A/W
16.0 75+90
75+110
75+132
25
30
40
80 DN6544 320 3600*2050*1900
3600*2050*2250
3200
3300
3400
DN50
RWH-200A/W
RWH-222A/W
RWH-250A/W
20.0 90+110
90+132
90+160
25
30
40
82 DN8052 320 3600*2050*22503900
4000
4200
DN50/DN65
RKH-220A/W
RKH-242A/W
RKH-270A/W
24.0 110+110
110+132
110+160
25
30
40
82 DN8060 320 3600*2050*22504000
4200
4500
DN50/DN65
RKH-264A/W
RKH-292A/W
RKH-332A/W
30.0 132+132
132+160
132+200
25
30
40
86DN12576500 4200*2050*22505000
5200
5400
DN65
RKH-360A/W
RKH-385A/W
RKH-450A/W
40.0 200+160
200+185
200+250
25
30
40
92DN125100500 4300*2050*22505600
5800
6000
DN65