Kaeser's air-cooled oil-free rotary screw air compressors deliver exceptional compressed air supply reliability - even in ambient temperatures as high as 115 ºF.

Thanks to an innovative system design, air-cooled models are available all the way up to 450 hp.
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CSG 55-2 A Model 50 Horsepower (hp) Nominal Motor Output Standard Version Air-Cooled Oil-Free Rotary Screw Compressor
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CSG 70-2 A Model 60 Horsepower (hp) Nominal Motor Output Standard Version Air-Cooled Oil-Free Rotary Screw Compressor
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CSG 90-2 A Model 75 Horsepower (hp) Nominal Motor Output Standard Version Air-Cooled Oil-Free Rotary Screw Compressor
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CSG 120-2 A Model 100 Horsepower (hp) Nominal Motor Output Standard Version Air-Cooled Oil-Free Rotary Screw Compressor

CSG 120-2 A Model 100 Horsepower (hp) Nominal Motor Output Standard Version Air-Cooled Oil-Free Rotary Screw Compressor
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CSG 130-2 A Model 125 Horsepower (hp) Nominal Motor Output Standard Version Air-Cooled Oil-Free Rotary Screw Compressor
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Description N/A Kaeser's air-cooled oil-free rotary screw air compressors deliver exceptional compressed air supply reliability - even in ambient temperatures as high as 115 ºF.

Thanks to an innovative system design, air-cooled models are available all the way up to 450 hp.
Brands N/A Kaeser Compressors
Model N/A CSG 55-2 A N/A CSG 70-2 A N/A CSG 90-2 A N/A CSG 120-2 A N/A CSG 130-2 A
Working Pressure N/A 90 psi125 psi N/A 60 psi90 psi125 psi N/A 60 psi90 psi125 psi145 psi N/A 60 psi90 psi125 psi145 psi N/A 125 psi145 psi
Complete System Flow Rate at 60 Pound Per Square Inch (psi) Working Pressure N/A N/A 344 acfm N/A 390 acfm N/A 461 acfm N/A
Complete System Flow Rate at 90 Pound Per Square Inch (psi) Working Pressure N/A 247 acfm N/A 298 acfm N/A 342 acfm N/A 459 acfm N/A
Complete System Flow Rate at 125 Pound Per Square Inch (psi) Working Pressure N/A 192 acfm N/A 245 acfm N/A 296 acfm N/A 421 acfm N/A 457 acfm
Complete System Flow Rate at 145 Pound Per Square Inch (psi) Working Pressure N/A N/A N/A 273 acfm N/A 420 acfm N/A 456 acfm
Maximum Positive Pressure at 60 Pound Per Square Inch (psi) Working Pressure N/A N/A 60 psi N/A 60 psi N/A 90 psi N/A
Maximum Positive Pressure at 90 Pound Per Square Inch (psi) Working Pressure N/A 90 psi N/A 90 psi N/A 90 psi N/A 90 psi N/A
Maximum Positive Pressure at 125 Pound Per Square Inch (psi) Working Pressure N/A 125 psi
Maximum Positive Pressure at 145 Pound Per Square Inch (psi) Working Pressure N/A N/A N/A 145 psi N/A 145 psi N/A 145 psi
Nominal Motor Output N/A 50 hp N/A 60 hp N/A 75 hp N/A 100 hp N/A 125 hp
Pressure Dew Point at 90 Pound Per Square Inch (psi) Working Pressure N/A
Pressure Dew Point at 125 Pound Per Square Inch (psi) Working Pressure N/A
Pressure Dew Point at 145 Pound Per Square Inch (psi) Working Pressure N/A
Width N/A 98 in
Depth N/A 65 in
Height N/A 85 in
Compressed Air Connection Thread Size N/A 2-1/2 in
Compressed Air Connection Thread Type N/A American National Standards Institute (ANSI) Class 150
Sound Pressure Level N/A 73 dBA N/A 73 dBA N/A 74 dBA N/A 75 dBA N/A 76 dBA
Weight N/A 5004 lb N/A 5093 lb N/A 5236 lb N/A 5545 lb N/A 5820 lb
Ambient Temperature N/A Up to +115 ºF
Additional Information N/A
  • Robust stainless steel-aluminum cooler combination
  • All models available with i.HOC® integrated heat of compression dryer
Advantages N/A
  • Heat-recovery made easy - Thanks to radial fans with high residual thrust, the heated exhaust air can easily be ducted away and used for heating an adjacent room without additional auxiliary fans.
  • Energy-efficient features - In standby mode, the temperature-controlled Kaeser standstill fan reliably dissipates residual heat. This allows the main fan to turn off and cools the package down for quicker service.
  • Exceptionally maintenance-friendly - Swing-out coolers make cleaning easy.
Low Life Cycle Costs N/A Our custom consulting services, award-winning product design, and continual investment in our research and development give you superior quality that's tailored for your needs.
Complete Unit N/A
  • Ready for operation
  • Fully automatic
  • Super-soundproofing
  • Vibration-dampened
  • Service-friendly design
Airend N/A
  • Two-stage, oil-free compression rotary screw compressor with precision gearing as per AGMA Q13/DIN- 5
  • 2nd compression stage uses stainless steel rotors and jacket cooling
  • Rotors feature durable coating
  • Integrated oil tank with oil tank ventilation
  • Fiber-free pulsation dampeners downstream of both compression stages
Drive Motor N/A
  • Manufactured by SIEMENS
  • Premium and Super Premium Efficiency Motor
  • Continuous motor winding temperature monitoring
  • Enclosure protection: IP 55
Cooling N/A
  • Generously sized compressed air aftercooler with stainless steel precooler and aluminum cooler
  • Reliable compressor performance up to 115 °F
  • Aluminum cooler for gear oil
Electrical Components N/A
  • Control cabinet to IP 54
  • Switching cabinet ventilation
  • Automatic wye-delta protection combination
  • Control transformer
Sigma Control 2 N/A
  • Plain text display
  • 30 selectable languages
  • Soft-touch keys with icons
  • Traffic-light LEDs for at-a-glance operational status
  • Fully automatic monitoring and control
  • Dual, Quadro, Vario and Continuous control included as standard
  • Interfaces: Ethernet
  • Optional communication modules for Profibus DP, Modbus, Profinet and DeviceNet
  • SD-card slot for data logging and updates
  • RFID reader
  • Web server
Hydraulic Inlet Valve N/A The hydraulic inlet valves in Kaeser's oil-free rotary screw compressors are unaffected by contamination and condensate. This makes them more reliable and easier to maintain than pneumatic valves.
Fiber-Free Pulsation Dampeners N/A Kaeser's new fiber-free pulsation dampeners keep pressure losses to an absolute minimum, help maintain consistent air quality and, unlike fiber versions, eliminate the possibility of compressed air contamination.
Reliable Oil Reservoir Venting N/A The microfilter in the oil tank venting system prevents the intake of oil-laden air. This ensures compressed air quality is maintained at all times.
Highly Efficient Condensate Separator N/A Thanks to its flow-optimized design, the newly developed condensate separator reliably separates the condensate downstream from the air coolers, and with minimal pressure loss.
Bolt-Down Machine Mounts N/A Machine mounts for bolting the unit to the floor
Silencer for Air Inlet Opening N/A Dampening louvers in front of heat exchangers
Cooling Air Filter Mats N/A
  • Cooling air filter mats in the inlet area of the compressor
  • Reduce build-up on heat exchanger surfaces and inlet air filters
Hot Air Connection N/A
  • Direct use of the hot compressed air, e.g. for heat regenerating desiccant dryer or as hot process air
  • With certain models, the desired hot air temperature can be controlled in ranges.
Refrigerated Dryer N/A
Power Consumption N/A
Pressure Dew Point N/A
Refrigerant N/A
Global Warming Potential N/A
Refrigerant Volume N/A
Refrigerant Mass as CO2 Equivalent N/A