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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.
Unit of Measure

Specifications

Brands

 N/A Kaeser Compressors

Model

 N/A FSG 420-2 i.HOC SFC A

Working Pressure

 N/A 90 psi125 psi145 psi

Complete System Flow Rate at 90 Pound Per Square Inch (psi) Working Pressure

 N/A 598 to 1517 acfm

Complete System Flow Rate at 125 Pound Per Square Inch (psi) Working Pressure

 N/A 608 to 1422 acfm

Complete System Flow Rate at 145 Pound Per Square Inch (psi) Working Pressure

 N/A 653 to 1334 acfm

Maximum Positive Pressure at 90 Pound Per Square Inch (psi) Working Pressure

 N/A 90 psi

Maximum Positive Pressure at 125 Pound Per Square Inch (psi) Working Pressure

 N/A 145 psi

Maximum Positive Pressure at 145 Pound Per Square Inch (psi) Working Pressure

 N/A 145 psi

Nominal Motor Output

 N/A 350 hp

Pressure Dew Point at 90 Pound Per Square Inch (psi) Working Pressure

 N/A -4 ºF

Pressure Dew Point at 125 Pound Per Square Inch (psi) Working Pressure

 N/A -20 ºF

Pressure Dew Point at 145 Pound Per Square Inch (psi) Working Pressure

 N/A -25 ºF

Compressed Air Connection Thread Size

 N/A 6 in

Compressed Air Connection Thread Type

 N/A American National Standards Institute (ANSI) Class 150

Sound Pressure Level

 N/A 83 dBA

Weight

 N/A 17086 lb

Ambient Temperature

 N/A Up to +115 ºF

Dimensions

Width

 N/A 182 in

Depth

 N/A 82 in

Height

 N/A 108 in

Additional Information

Additional Information

 N/A
  • Robust stainless steel-aluminum cooler combination
  • Available with Sigma Frequency Control, variable speed control (VSD) for superior part load performance
  • All models available with i.HOC® integrated heat of compression dryer

Advantages

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

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.

Equipment

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

Quality in Detail

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.

Options

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.
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