| After-sales Service: | Online Support |
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| Warranty: | 2year |
| Lubrication Style: | Oil-free |
| Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier 7.5kW~250kw Water Lubricated Oil Free Screw Air Compressor for Oxygen Plant
Model: RW-75A/W
Type: oil free water lubrication screw air compressor
Screw type: Single screw
Free air delivery: 13 m3/min
Working pressure: 8bar
Control: Touch screen PLC
Driven: direct
Cooling: by air
Starting method: Frequency conversion start
Inverter brand: Inovance
Lubricating water volume: 120 liters
Electric motor: 100hp 75KW 380v/50hz/3ph,IP55
Discharge temperature: less than ambient +8 ºC
Noise: less than 73 dB(A)
Air outlet size: G2"
Dimension: 2160*1600*1900mm
Weight: 2250kg
Product Features
1. The materials of whole air end are stainless steel (Both screw rotor and shell are stainless steel).
2. The ultra-high efficiency rare earth permanent magnet synchronous motor adopts original imported SKF bearing, which is 6%~8% more energy saving than the ordinary motor.
3. Aerospace stainless steel rotor, high strength wear resistance, corrosion resistance 0 stress deformation.
4. Main machine shell adopts SU304, Star wheel material using CF(carbon fiber) composite, with super wear resistance, strength, toughness.
5.Super high-efficiency non-contact meshing in the compression chamber, the pioneering design of "dynamic suspension" of the star wheel, the star wheel blade is close to "0" wear, the actual normal use is affected by environmental factors in 40,000 hours of machine exhaust down about 3%.
6. All piping systems, water vapor separation drums, water filtration systems, water cooler systems and so on. All SU304 stainless steel is adopted to ensure that the system is clean, pollution-free and free from corrosion and rust.
7. The compressed air is cleaned with purified water and basically does not contain airborne particles.
8. Passed the highest level certification of the world's authoritative oil-free compressor: German tuv-is 08573-3 "0" level oil-free certification.
9. Microcomputer control, 7-inch high-definition touch screen, automatic alarm, automatic protection, intelligent joint control, remote control (optional) and cloud network control (optional).
10.Danfoss stainless steel cooler is adopted.
Technical parameter
| Model | Air Delivery (m3/min) | Power (kW) | Lubricating water amount (Liters) | Cooling water amount T/Hour | Cooling water inlet/outlet diameter | Noise dB(A) | Outlet diameter | Dimension (mm) | ||
| 8 bar | 10 Bar | 12.5 bar | L*W*H | |||||||
| RW-08A/W | 1.17 | 1.05 | 0.81 | 7.5 | 10 | 2.0 | 3/4" | 58 | 3/4" | 800*800*1200 |
| RW-11A/W | 1.65 | 1.42 | 1.10 | 11 | 26 | 2.5 | 1" | 60 | 3/4" | 1150*755*1340 |
| RW-15A/W | 2.43 | 2.17 | 1.80 | 15 | 26 | 3.5 | 1" | 63 | 3/4" | 1150*755*1340 |
| RW-18A/W | 3.13 | 2.82 | 2.05 | 18.5 | 30 | 4.0 | 1" | 65 | 1" | 1400*900*1450 |
| RW-22A/W | 3.52 | 3.21 | 2.78 | 22 | 30 | 5.0 | 1" | 65 | 1" | 1400*900*1450 |
| RW-30A/W | 5.12 | 4.43 | 3.63 | 30 | 40 | 7.0 | 1 1/2" | 67 | 1 1/4" | 1550*1150*1550(A) 1500*1150*1300(W) |
| RW-37A/W | 6.30 | 5.33 | 4.77 | 37 | 40 | 9.0 | 1 1/2" | 67 | 1 1/4" | 1550*1150*1550(A) 1500*1150*1300(W) |
| RW-45A/W | 7.40 | 6.30 | 5.56 | 45 | 90 | 10.0 | 1 1/2" | 68 | 2" | 1980*1300*1760(A) 1800*1300*1670(W) |
| RW-55A/W | 9.60 | 8.55 | 7.67 | 55 | 120 | 12.0 | 1 1/2" | 70 | 2" | 1980*1300*1760(A) 1800*1300*1670(W) |
| RW-75A/W | 13.00 | 11.50 | 9.70 | 75 | 120 | 18.0 | 1 1/2" | 73 | 2" | 2100*1600*1900(A) 2200*1500*1800(W) |
| RW-90A/W | 14.80 | 13.90 | 12.60 | 90 | 180 | 20.0 | 1 1/2" | 73 | 2 1/2" | 2400*1600*2000(A) 2200*1500*1800(W) |
| RW-110A/W | 19.85 | 16.66 | 15.56 | 110 | 180 | 24.0 | 2" | 78 | 2 1/2" | 3000*1700*2250(A) 2200*1500*1800(W) |
| RW-132A/W | 23.10 | 19.97 | 16.90 | 132 | 240 | 30.0 | 2" | 78 | 2 1/2" | 3000*1700*2250(A) 2200*1500*1800(W) |
| RW-160W | 28.11 | 25.45 | 22.52 | 160 | 240 | 35.0 | 3H | 80 | DN80 | 2700*2800*2050 |
| RW-185W | 33.97 | 29.00 | 25.21 | 185 | 300 | 38.0 | 3" | 80 | DN80 | 2700*2800*2050 |
| RW-200W | 36.75 | 32.78 | 29.24 | 200 | 300 | 42.0 | 4" | 80 | DN100 | 2700*2800*2050 |
| RW-220W | 39.67 | 36.75 | 29.63 | 220 | 360 | 47.0 | 4" | 80 | DN100 | 2700*2800*2050 |
| RW-250W | 43.50 | 39.30 | 34.00 | 250 | 360 | 58.0 | 4" | 80 | DN100 | 2700*2800*2050 |
| Note:" A" means air cooling," W" means water cooling. | ||||||||||
Shanghai Rocky Machinery Co., Ltd. is a company dedicated to the production and research and development of various gas compression equipment. The company was established in 2012 and has a total of 5 licensed technical engineers. Mainly engaged in air, nitrogen, CO2 and other special gas compression equipment and after-treat equipment. With the development in recent years, the company has established a foreign trade team in Shanghai, and hired foreign trade consultants with 10 years of industry experience to better serve customers worldwide. With excellent quality and the support of 30 distributors worldwide, our annual sales in 2018 exceeded 5 million US dollars. We look forward to working with you to create a better tomorrow!
Q1. Are you trading company or manufacture ?
A: We are professional manufacture of screw air compressor of Taicang,Jiangsu,China. More than 18 years of experience in air compressor manufacturing.
Q2. How long is the delivery time ?
A: For standard voltage ,15 working days. Non-standard ,please contact our sales.
Q3. What's payment term ?
A: T/T, L/C, D/P, Western Union, Paypal, Credit Card, and etc. Also we could accept USD, RMB, Euro and other currency.
Q4. How about your after-sales service ?
A: 1.Provide customers with installation and commissioning online instructions.
2. Well-trained engineers available to overseas service.
3.Worldwide agents and after service avaiable.arrange our engineers to help you training and installation.
Q5. How about your warranty?
A: One year for the whole machine and two years for screw air end, except consumable spare parts.
Q6. Do you have any certificate ?
A: Yes, per different customer's market need ,we can offer CE ,ISO etc certificate.
Q7. What about the maintenance ?
A: First maintenance need to be done after 500Hours, and then every 2000-3000 hours to do the normal maintenance, and consider the actual environment.
Q8. How do you control quality ?
A: 1. The raw materials are strictly inspected
2. Some key parts are imported from overseas
3. Each compressor must pass at least 5 hours of continuous testing before leaving the factory.
Q9. Do you offer OEM service ?
A: Yes.Both OEM & ODM service can be accepted.
Q10.How long could your air compressor be used?
A: Generally, more than 10 years.
Suppliers with verified business licenses
Audited Supplier 
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