Comair has the widest range of water injected screw compressors for your demanding industrial requirements. Our water injected screw compressors discharge compressed air of 4 to 40 bar(g) and 7 to 1600 CFM.
Comair water injected screw compressors are designed to discharge 100% oil-free and ISO 8573-1 Class 0 compressed air. This contamination free air could successfully protect your end products as well as your production facilities. For your food & beverage production lines, we can ensure even the slightest change of flavor will not happen to your end products using our oil free water injected screw compressors.
Share us your requirements now! Let us supply the highest reliable oil free water injected screw compressor solutions to your production factory.
Types Of Water Injected Screw Compressor
Water Injected Single Stage Screw CompressorOil free air with the pressure of 7-12.5 barg for blow glass bottle, textile, pharmaceutical, food & beverage.
Water Injected Two Stage Screw CompressorEnergy efficient 100% oil free air for your PET blowing application with the pressure of up to 40 barg.
Water Injected Screw Booster CompressorReliable and stable performance you can always trust. Delivers TUV certified oil free compressed air for your PET blowing factory.
Fixed Speed Water Injected Screw CompressorStable oil free compressed air supply with minimum maintenance and downtime.
VSD Water Injected Screw CompressorSave as much as 30% electricity bill for your factory while delivering your required oil free air.
Water Injected Screw Gas CompressorProved to be reliable for all common gases and reference cases for all common applications could be supplied.
High Pressure Water Injected Screw CompressorStable high pressure oil free air of 40 barg, ideal solution for PET blowing application.
Low Pressure Water Injected Screw CompressorOil free air with the pressure of 3-4 barg for blow glass bottle, textile, pharmaceutical, food & beverage.
Super Clean Air For Your Demanding Requirements
For Comair water injected screw compressor, water is used to lubricate, cool and seal the compressing chamber, discharging a totally oil free compressed air; Moreover, after flushed by the lubricating water, all the other dusts are also removed from the compressed air making it cleaner and suitable for directly breathing purpose.


Comair Water Injected Screw Compressors, Highest Energy Efficiency Guarantee
To lower your energy costs, Comair developed Variable Speed Drive (VSD) technology, adjusting motor speed according to your real time air consumption. Comair VSD solution results in major energy savings and protects the environment for the future. The specific heat capacity of water is the largest, which makes the compression almost isothermal. So our water injected screw compressor discharges over 10% more air than the oil free screw compressor of the same motor power.
Easy Operation For Your Water Injected Screw Compressor
Are you worrying about those complicated compressors operation and maintenance?
Comair water injected screw compressors are designed with PLC intelligent control for simple and convenient operation. They come with the functions including automatic fault detection, malfunction warning, maintenance reminding, automatic protection. Moreover, it could operate 24 hours unattended and can be controlled remotely.

Water injected oil free screw compressor will use water to lubricate, seal and cool the compressing chamber while oil free dry screw compressor compresses air without any lubricants inside the air end.
The water injected screw compressor has a better specific power because the water is the best heat absorption liquid. So its compressing is more like an isothermal one; water injected screw compressor is also more silent which is suitable for noise control working environments; after being cooled by the lubricating water, its discharging air temperature will be lower.
The oil free dry screw compressor will be more compact and smaller, suitable for limited installation space. Also its discharging air is dryer, requiring less moisture removing procedure.
Comair water injected screw compressor price is mainly dependent on how large it is. We have 5.5 kW / 7.5 HP to 250 kW / 340 HP water injected screw compressors. The price ranges from several thousand to several hundred thousand US dollars.
Water plays a key role in water injected screw compressor internal process.
Water is injected inside the compressing chamber. During this injection, water will take away the compressing heat and cool down the rotor, star wheels as well as compressed air. Water has the largest specific heat and could take away the most compressing heat. That’s why it is near isothermal compressing. Moreover, water is also lubricating rotor and star wheel similar as lubricating oil. Water can also mitigate frictions and lower the noise level.
Comair water injected screw compressors have the following advantages over the others on the market:
Supplying compressed air of stable pressure: Comair water injected screw compressors are designed for discharging stable compressed air. Its pressure could be set at the variants of 0.01 bar, ensuring most accurate supplying and energy saving.
Totally oil free: Comair water injected screw compressor supplies the most clean compressed air. The compressed air is not just totally oil free but also dusts free, which could be used directly even for breathing purpose.
Silent Operation: Comair water injected screw compressors are the perfect solution for silent operation requirements. There is much less friction inside than oil free dry type screw compressors.
Comair offers unrivaled after sales services to the clients. We believe clients’ satisfaction will bring a much larger market to us.
Regular Maintenance: we will provide regular maintenance and inspections to the Comair water injected screw compressors.
Emergency Repairs: Our team of experts will provide 24/7 emergency repairs to our compressors. After receiving your emails or calls, a fast response will be made to solve your problems and minimise your downtime.
Technical Training or Support: We will provide comprehensive training to our clients. So their operators could know how to operate the compressors.
No, it will not. All the internal pipes are made of food-grade stainless steel. It will not cause any corrosion or rusts to damage your production facilities or contaminate your end products.
Related Product
Comair oil free screw compressors are widely used for food & beverage production, medical & pharmaceutical factories, and other sensitive applications.




