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100% Oil Free Variable Speed Screw Air Compressor for Food Industry
Product featues
1. 100% oil-free compressed air
* Zero oil content: Water is used as the lubricating and sealing medium to ensure that the compressed air is completely oil-free (Class 0 certification), meeting the strict air quality requirements of industries such as food, medicine, and electronics.
* No oil pollution risk: Avoid oil mist pollution of traditional oil-lubricated compressors and reduce back-end filtration costs (such as no activated carbon filter).
2. Advantages of water lubrication technology
* Lubrication and cooling in one: Water replaces lubricating oil and directly cools the compression chamber, which has higher heat dissipation efficiency and extends the life of the main engine.
* Low maintenance cost: No need to regularly replace lubricating oil and oil filter, only need to deal with the water circulation system (regularly replace water filter and anti-scaling agent).
* Environmentally friendly and non-toxic: Water as a medium is pollution-free, wastewater treatment is simple, and it meets green manufacturing standards.
3. High efficiency and energy saving of permanent magnet variable frequency motor (PM motor)
* IE4/IE5 ultra-high energy efficiency: The efficiency of permanent magnet motor is 10%~15% higher than that of ordinary asynchronous motor, and the energy saving is more significant at partial load.
* Wideband regulation (25%~100%): variable frequency drive accurately matches gas demand, avoids no-load waste, and saves 30%~50% of energy.
* Low starting current: soft start reduces grid impact and is suitable for frequent start-stop scenarios.
4. Low noise and low vibration
* Water lubrication noise reduction: the damping effect of water reduces mechanical friction noise, and the noise of the whole machine is usually <65dB(A).
* Permanent magnet motor silent operation: no excitation loss, less vibration.
5. High reliability and long life
* Simplified host structure: oil-free design reduces carbon deposition risk, and key components (such as screws and bearings) use corrosion-resistant coatings.
* Intelligent control protection: real-time monitoring of water temperature, pressure, and flow to prevent overheating or scaling.
6. Application scenarios
* High cleanliness demand industries: pharmaceuticals (GMP certification), food and beverages, semiconductors, laboratories.
* Environmentally sensitive fields: hospitals, sewage treatment, and new energy battery manufacturing.
* Energy-saving scenarios: Factories with 24-hour continuous production and large fluctuations in gas consumption.
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. | ||||||||||
Oil-free water-lubricated air compressors are widely used in high-demand and high-standard industries such as medicine, food, masks, spraying, precision electronics, melt-blown cloth, biological fermentation oxygen production, and nitrogen production.
Shanghai Rocky Machinery Co., Ltd. was established in 2003 and has 18 years of experience in the air compressor industry. It is an innovative enterprise integrating production, trade, service, research and development.
We are professional gas compressors manufacturer since 2003, Germany standard, more than 100 workers, annual sales exceeding 20 million US dollars with 13 years of exporting experience, strict quality control and delivery on time. We not only supply gas compressor including screw air compressor, but also supply spares parts and after-treat machines.
Our main products series as follows.
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.
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