Proven Technology
Over 65 years of field experience in all industries has proven that the KNW Series rotary screw design is the preferred choice for reliability, energy efficiency and serviceability.
Two-Stage Design - Powered by Kobelco Oil-Free Screw Technology
Heavy duty, two-stage compression module with thrust balancing for
long bearing life in each stage. Designed, tested and manufactured in the USA. No other oil-free compressor manufacturer has made that commitment to the North American market. Also available as single stage design for low pressure applications.
Coated Rotors
ASTM 1144 steel rotors with exclusive PTFE coating on rotors and shafts for maximum efficiency and corrosion protection. Gears and bearings are lubricated by a unique motor driven oil pump that provides positive lubrication prior to start-up, through operation and after shutdown. This is an especially important feature for VFD models and not available on competitive offerings.
Unique Design Features
Key design features ensure long air end life. All features may not be available on competitive models.

• Non contact maintenance free air and oil seals
• Thrust balance compensation
• Cooling jackets
• Dual vents to atmosphere ensure oil-free air
• Vacuum degassed thrust and radial bearings
• Premium AGMA rated gears
• All models meet the requirements of NFPA 99 for use as a medical compressor

Service Indicators
- Air inlet filter condition indicator
- Oil filter condition indicator
- Oil level gauge
- Routine maintenance
Pressure Indicators
- First stage air discharge pressure
- Second stage air discharge pressure
- Oil pressure
Temperature Indicators
- First stage air discharge
- Second stage air inlet
- Second stage air discharge
- Lube oil
- Compressor discharge temperature
Additional Indicators
- Stand-by mode light
- Oil pump run light
- Fan run light
- Compressor run light
- Compressor load light
- Alarm light
- Hour meter – running time
- Hour meter – loaded time
- Manual unload light and switch
- Pre alarms
-HMI display

Additional Features
Packaged Assembly
- Air-cooled or water cooled
- Integral air-cooled or watercooled aftercooler with moisture separator and automatic drain
- Cabinet ventilating fan
- Easy access for maintenance
- Removable doors
- Low installation cost
- Few connections
required for installation – compressed air, condensate drains, electrical and water (when required)
- Solid State motor starter (460 volt standard)
- C/US certified panel
Advanced Design
- Super Rotor delivers more cfm per horsepower
- Patent numbers 4583927 & 4671749
- Stainless Steel Rotors
Efficient Control
- Load/unload electro- pneumatic
- Low unload horsepower
Healthcare Facility Option
- No vibration generated in rotary design
- No special foundation required
- Variable frequency drive available
- Approved by NFPA for use as Medical Air compressor