3 to 30 hp Rotary Screw Compressors


Compact design with impressive performance

Kaeser's belt-driven rotary screw compressors provide outstanding efficiency and reliability. an energy-saving SIGMA PROFILE airend and a SIGMA CONTROL 2 controller to ensure outstanding efficiency and performance. You can choose from four series with these technical parameters:

  • Pressure: 125, 160, or 217 psig
  • Flow rate: 9 - 140 cfm

All series are available as standard models but also with:

  • Integrated refrigerated dryer for high compressed air quality and/or
  • Speed-controlled motor for a large flow rate control range. (SM, SK and AS series)

We will gladly help you identify which model is the perfect solution for your application.

Your advantages

  • Highly-efficient power transmission:
    The quality drive belt with automatic tensioning device ensures consistent transmission efficiency and excellent drive system reliability over the entire service life.
  • Easy maintenance:
    The housing is easily opened. All components are logically arranged and easy to access. Maintenance work is therefore made quick and simple.
  • Exceptionally quiet:
    The soundproofed housing reduces operational noise to a minimum. Normal conversation can take place right next to the compressor.
 

Our rotary screw compressors with belt drive in detail:

Series comparison
Standard Drive Power range hp Flow rate cfm Pressure psig
SX Multi-ribbed belt 3 - 7.5 9 – 28 125/160/217
SM Multi-ribbed belt 7.5 - 15 19 - 57 125/160/217
SK Multi-ribbed belt 15 – 20 46 - 88 125/160/217
AS Multi- ribbed belt 20 – 30 64 – 141 125/160/217

Find the right rotary screw compressor

Save money and reduce energy costs by selecting a compressor with just the right amount of power to suit your needs. Ask us – we're happy to help you select the right unit.

Technical Specifications

The technical specifications can be found in these brochures:

SX Series Rotary Screw Compressors – Equipment

Complete unit

SX rotary screw compressor – open
  • Ready-to-run
  • Fully automatic
  • Super silenced
  • Vibration-dampened
  • All panels powder-coated
  • For ambient temperatures up to +115 °F
  • Easy access to all service points thanks to removable left cover

Electric motor

  • IE3 premium efficiency motor
  • Quality German manufacture
  • IP 54

Rotary screw airend

SIGMA PROFILE rotors require approximately 10 to 20 percent less energy than conventional rotors of the same air delivery capacity.

Efficient cooling

  • Dual flow fan and separate air flow channels for cooling of the motor, the fluid/compressed air cooler and the control cabinet
  • Fluid and air flow: 'Honeycomb' air intake filter, pneumatic inlet and venting valves, cooling fluid separator tank with triple separation system
  • Pressure relief valve
  • Minimum pressure check valve
  • Thermostatic valve and fluid filter in coolant circuit
  • Fluid / compressed air combination cooler

Refrigerated dryer (with T version)

  • With electronically-controlled condensate drain
  • Refrigerant compressor with energy-saving, cycling shut-down feature
  • Linked to operational status of the compressor when inactive
  • Alternatively, continuous operation can be selected on site
  • Contains fluorinated greenhouse gas R-513A

Electrical components

  • Control cabinet to IP 54
  • Control cabinet ventilation
  • Automatic star-delta starter
  • Overload relays
  • Control transformer

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller
  • Traffic-light LEDs for at-a-glance operational status
  • Easy-to-read display
  • 30 selectable languages
  • Soft-touch icon buttons
  • Fully-automatic monitoring and control
  • Dual, Quadro, Vario and Continuous control modes available as standard
  • Interfaces: Ethernet
  • Additional optional communication modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD card slot for data logging and updates
  • RFID reader
  • Web server
SM Series Rotary Screw Compressors – Equipment

Complete unit

SM rotary screw compressor – open
  • Ready-to-run
  • Fully automatic
  • Super silenced
  • Vibration-dampened
  • All panels powder-coated
  • For ambient temperatures up to +115 °F

Rotary screw airend

  • Single stage with cooling fluid injection for optimal rotor cooling
  • Genuine KAESER screw compressor airend with the SIGMA PROFILE

Electric motor

  • Premium Efficiency IE3 or IE4
  • Quality German manufacture
  • IP 54

Efficient cooling

  • Dual flow fan and separate air flow channels for cooling of the motor, the fluid/compressed air cooler and the control cabinet
  • Fluid and air flow: 'Honeycomb' air intake filter, pneumatic inlet and venting valves, cooling fluid separator tank with triple separation system
  • Pressure relief valve
  • Minimum pressure check valve
  • Thermostatic valve and fluid filter in coolant circuit
  • Fluid / compressed air combination cooler

Refrigerated dryer (with T version)

  • With electronically-controlled condensate drain
  • Refrigerant compressor with energy-saving, cycling shut-down feature
  • Linked to operational status of the compressor when inactive
  • Alternatively, continuous operation can be selected on site
  • Contains fluorinated greenhouse gas R-513A

Electrical components

  • Control cabinet to IP 54
  • Control cabinet ventilation
  • Automatic star-delta starter
  • Overload relays
  • Control transformer

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller
  • Traffic-light LEDs for at-a-glance operational status
  • Easy-to-read display
  • 30 selectable languages
  • Soft-touch icon buttons
  • Fully-automatic monitoring and control
  • Dual, Quadro, Vario and Continuous control modes available as standard
  • Interfaces: Ethernet
  • Additional optional communication modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD card slot for data logging and updates
  • RFID reader
  • Web server
SK Series Rotary Screw Compressors – Equipment

Complete unit

AIRCENTER SK – removable enclosure cover
  • Ready-to-run
  • Fully automatic
  • Super soundproofing
  • Vibration dampening
  • Powder-coated panels
  • For ambient temperatures up to +115 °F
  • Easy access to all service points

Rotary screw airend

  • Single stage with cooling fluid injection for optimal rotor cooling
  • Genuine KAESER screw compressor airend with the SIGMA PROFILE
  • Multi-ribbed, single belt drive

Electric motor

  • IE3 premium efficiency motor
  • Quality German manufacture
  • IP 54

Efficient cooling

  • Dual flow fan and separate air flow channels for cooling of the motor, the fluid/compressed air cooler and the control cabinet
  • Fluid and air flow: 'Honeycomb' air intake filter, pneumatic inlet and venting valves, cooling fluid separator tank with triple separation system
  • Pressure relief valve
  • Minimum pressure check valve
  • Thermostatic valve and fluid filter in coolant circuit
  • Fluid / compressed air combination cooler

Refrigerated dryer (with T version)

  • With electronically-controlled condensate drain
  • Refrigerant compressor with energy-saving, cycling shut-down feature
  • Linked to operational status of the compressor when inactive
  • Alternatively, continuous operation can be selected on site
  • Contains fluorinated greenhouse gas R-513A

Electrical components

  • Control cabinet to IP 54
  • Control cabinet ventilation
  • Automatic star-delta starter
  • Overload relays
  • Control transformer

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller
  • Traffic-light LEDs for at-a-glance operational status
  • Easy-to-read display
  • 30 selectable languages
  • Soft-touch icon buttons
  • Fully-automatic monitoring and control
  • Dual, Quadro, Vario and Continuous control modes available as standard
  • Interfaces: Ethernet
  • Additional optional communication modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD card slot for data logging and updates
  • RFID reader
  • Web server
AS Series Rotary Screw Compressors – Equipment

Complete unit

  • Ready for operation
  • Fully automatic
  • Super silenced
  • Vibration-dampened
  • All panels powder-coated
  • For ambient temperatures up to +115 °F

Sound insulation

Panels lined with laminated mineral wool

Vibration dampening

  • Anti-vibration mounts
  • Dual anti-vibration mount

Airend

  • Single stage with cooling fluid injection for optimal rotor cooling
  • Genuine KAESER screw compressor airend with the SIGMA PROFILE

Drive

  • V-belt drive with automatic belt tensioning

Electric motor

  • IE3 premium efficiency motor
  • Premium quality German-made motor
  • IP 55
  • Insulation class F for greater power reserve

Electrical components

  • Control cabinet to IP 54
  • Control transformer
  • Siemens frequency converter
  • Volt-free contacts for ventilation control

Fluid and air flow

  • Dry air filter
  • Pneumatic inlet and venting valves
  • Cooling fluid reservoir with three-stage separator system
  • Pressure relief valve
  • Minimum pressure/check valve
  • Thermostatic valve and micro-filter in coolant circuit
  • All fully piped
  • Flexible couplings

Cooling

ASK series details: Energy-saving radial fan
  • Air-cooled
  • Separate aluminum coolers for compressed air and fluid
  • Radial fan meets the high requirements on fan efficiency demanded by the EU Directive 327/2011

Refrigerated dryers

ASK series details: Refrigeration dryer with ECO-DRAIN
  • CFC-free
  • Contains fluorinated greenhouse gas R-513A
  • Fully insulated
  • Hermetically sealed refrigerant circuit
  • Rotary refrigerant compressor with energy-saving, cycling shut-down feature
  • Hot gas bypass control
  • Electronic condensate drain

Heat recovery (HR)

  • Optionally available with integrated heat recovery system (plate-type heat exchanger)

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller
  • Traffic-light LEDs for at-a-glance operational status
  • Easy-to-read display
  • 30 selectable languages
  • Soft-touch icon buttons
  • Fully-automatic monitoring and control
  • Dual, Quadro, Vario and Continuous control modes available as standard
  • Interfaces: Ethernet
  • Additional optional communication modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD card slot for data logging and updates
  • RFID reader
  • Web server
SX Double Play
It's a Double-Play!

For a limited time take advantage of discounted pricing on a pair of SX 5 or SX 7.5 units, with an optional air treatment package!

Get details and buy online only!
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