Rotary screw compressors with belt drive

Compact design with impressive performance

Kaeser rotary screw compressors with V-belt drive provide outstanding efficiency and reliability. They feature the energy-saving SIGMA profile rotor and a SIGMA CONTROL 2 (or, optionally, SIGMA CONTROL BASIC) controller. You can choose from four series with these technical parameters:

  • Pressure: 8, 11 or 15 bar
  • Flow rate: 0.26 – 4.65 m³/min

All series are available as standard models but also with

  • Add-on refrigeration dryer for high compressed air quality and/or
  • Speed-controlled motor for a large flow rate control range. (SM, SK and ASK series)

We will gladly tell you which model is the perfect solution for you.

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.

Profitable thanks to low life-cycle costs
Life-cycle costs

Our comprehensive approach to optimal profitability: Optimal efficiency, easiest operation, service-friendliness and a global service and consulting network with fast response times.

 

Our rotary screw compressors with belt drive in detail

All series in comparison

Standard Drive Power range kW Flow rate m³/min Pressure bar
SX Flat drive belt 2.2 – 5.5 0.26 – 0.81 8/11/15
SM V-belt 5.5 – 9 0.28 – 1.52 8/11/15
SK V-belt 11 – 15 0.53 – 2.7 8/11/15
ASK V-belt 15 – 22 0.79 – 4.65 8/11/15

Find the right compressor

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

SX Series Rotary Screw Compressors – Equipment

Complete unit

SX rotary screw compressor – open

  • Ready-to-run
  • Fully automatic
  • Super sound-proofed
  • Vibration-damped
  • All panels powder-coated
  • For ambient temperatures up to +45 °C
  • Easy access to all service points thanks to removable left cover

Electric motor

  • Premium Efficiency IE2
  • Premium quality German-made motor
  • 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

Refrigeration 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

Electrical components

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

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller

  • "Traffic-light" LED indicators show operational status at a glance
  • Plain text display
  • 30 selectable languages
  • Soft-touch keys with icons
  • Fully automated monitoring and control
  • Selection of Dual, Quadro, Vario and Continuous control as standard
  • Interfaces: Ethernet
  • Additional optional communications 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 sound-proofed
  • Vibration-damped
  • All panels powder-coated
  • For ambient temperatures up to +45 °C

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
  • Premium quality German-made motor
  • 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

Refrigeration 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

Electrical components

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

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller

  • "Traffic-light" LED indicators show operational status at a glance
  • Plain text display
  • 30 selectable languages
  • Soft-touch keys with icons
  • Fully automated monitoring and control
  • Selection of Dual, Quadro, Vario and Continuous control as standard
  • Interfaces: Ethernet
  • Additional optional communications modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD-card slot for data-logging and updates
  • RFID reader
  • Web server
  • SM rotary screw compressors are optionally available with SIGMA CONTROL BASIC

SK Series Rotary Screw Compressors – Equipment

Complete unit

AIRCENTER SK – removable enclosure cover

  • Ready-to-run
  • Fully automatic
  • Super sound-proofed
  • Vibration-damped
  • All panels powder-coated
  • For ambient temperatures up to +45 °C

Rotary screw airend

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

Electric motor

  • Premium Efficiency IE3
  • Premium quality German-made motor
  • 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

Refrigeration 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

Electrical components

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

SIGMA CONTROL 2

SIGMA CONTROL 2 compressor controller

  • "Traffic-light" LED indicators show operational status at a glance
  • Plain text display
  • 30 selectable languages
  • Soft-touch keys with icons
  • Fully automated monitoring and control
  • Selection of Dual, Quadro, Vario and Continuous control as standard
  • Interfaces: Ethernet
  • Additional optional communications modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD-card slot for data-logging and updates
  • RFID reader
  • Web server
  • SK rotary screw compressors are optionally available with SIGMA CONTROL BASIC

ASK Series Rotary Screw Compressors – Equipment

Complete unit

  • Ready for operation
  • Fully automatic
  • Super sound-proofed
  • Vibration-damped
  • All panels powder-coated
  • For ambient temperatures up to +45 °C

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 rotary screw 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 aluminium coolers for compressed air and fluid
  • Radial fan meets the high requirements on fan efficiency demanded by the EU Directive 327/2011

Refrigeration dryers

ASK series details: Refrigeration dryer with ECO-DRAIN

  • CFC-free
  • R 134a refrigerant
  • 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" LED indicators show operational status at a glance
  • Plain text display
  • 30 selectable languages
  • Soft-touch keys with icons
  • Fully automated monitoring and control
  • Selection of Dual, Quadro, Vario and Continuous control as standard
  • Interfaces: Ethernet
  • Additional optional communications modules for: Profibus DP, Modbus, Profinet and DeviceNet
  • SD-card slot for data-logging and updates
  • RFID reader
  • Web server
  • Optionally available with SIGMA CONTROL BASIC

Technical specifications SX

Standard version

ModelSX 3 SX 4 SX 6
Working pressure bar 7.5 10 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.34 0.26 0.45 0.36 0.26 0.6 0.48 0.37
Max. positive pressure bar 8 11 8 11 15 8 11 15
Nominal motor output kW 2.2 3 4
Dimensions W x D x H mm 590 x 632 x 970 590 x 632 x 970 590 x 632 x 970
Compressed air connectionG ¾ G ¾ G ¾
Sound pressure level dB(A) 59 60 61
Weight kg 140 140 145

ModelSX 8
Working pressure bar 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.8 0.67 0.54
Max. positive pressure bar 8 11 15
Nominal motor output kW 5.5
Dimensions W x D x H mm 590 x 632 x 970
Compressed air connectionG ¾
Sound pressure level dB(A) 64
Weight kg 155

T version

ModelSX 3 T SX 4 T SX 6 T
Working pressure bar 7.5 10 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.34 0.26 0.45 0.36 0.26 0.6 0.48 0.37
Max. positive pressure bar 8 11 8 11 15 8 11 15
Nominal motor output kW 2.2 3 4
Dimensions W x D x H mm 590 x 915 x 970 590 x 915 x 970 590 x 915 x 970
Compressed air connectionG ¾ G ¾ G ¾
Sound pressure level dB(A) 59 60 61
Weight kg 185 185 190

ModelSX 8 T
Working pressure bar 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.8 0.67 0.54
Max. positive pressure bar 8 11 15
Nominal motor output kW 5.5
Dimensions W x D x H mm 590 x 915 x 970
Compressed air connectionG ¾
Sound pressure level dB(A) 64
Weight kg 200

Technical specifications SM

Standard version

ModelSM 9 SM 12 SM 15
Working pressure bar 7.5 10 13 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.9 0.75 0.56 1.2 1.01 0.77 1.5 1.26 0.99
Max. positive pressure bar 8 11 15 8 11 15 8 11 15
Nominal motor output kW 5.5 7.5 9
Dimensions W x D x H mm 630 x 762 x 1,100 630 x 762 x 1,100 630 x 762 x 1,100
Compressed air connectionG ¾ G ¾ G ¾
Sound pressure level dB(A) 64 65 66
Weight kg 200 210 220

T version

ModelSM 9 T SM 12 T SM 15 T
Working pressure bar 7.5 10 13 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.9 0.75 0.56 1.2 1.01 0.77 1.5 1.26 0.99
Max. positive pressure bar 8 11 15 8 11 15 8 11 15
Nominal motor output kW 5.5 7.5 9
Dimensions W x D x H mm 630 x 1,074 x 1,100 630 x 1,074 x 1,100 630 x 1,074 x 1,100
Compressed air connectionG ¾ G ¾ G ¾
Sound pressure level dB(A) 64 65 66
Weight kg 275 285 295

SFC version

ModelSM 12 SFC
Working pressure bar 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.34 - 1.24 0.34 - 1.04 0.3 - 0.78
Max. positive pressure bar 8 11 15
Nominal motor output kW 7.5
Dimensions W x D x H mm 630 x 762 x 1,100
Compressed air connectionG ¾
Sound pressure level dB(A) 67
Weight kg 220

T-SFC version

ModelSM 12 T SFC
Working pressure bar 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.34 - 1.24 0.34 - 1.04 0.3 - 0.78
Max. positive pressure bar 8 11 15
Nominal motor output kW 7.5
Dimensions W x D x H mm 630 x 1,074 x 1,100
Compressed air connectionG ¾
Sound pressure level dB(A) 67
Weight kg 295

Technical specifications SK

Standard version

ModelSK 22 SK 25
Working pressure bar 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 2 1.68 1.32 2.5 2.11 1.72
Max. positive pressure bar 8 11 15 8 11 15
Nominal motor output kW 11 15
Dimensions W x D x H mm 750 x 895 x 1,260 750 x 895 x 1,260
Compressed air connectionG 1 G 1
Sound pressure level dB(A) 66 67
Weight kg 312 320

T version

ModelSK 22 T SK 25 T
Working pressure bar 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 2 1.68 1.32 2.5 2.11 1.72
Max. positive pressure bar 8 11 15 8 11 15
Nominal motor output kW 11 15
Dimensions W x D x H mm 750 x 1,240 x 1,260 750 x 1,240 x 1,260
Compressed air connectionG 1 G 1
Sound pressure level dB(A) 66 67
Weight kg 387 395

SFC version

ModelSK 22 SFC SK 25 SFC
Working pressure bar 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.62 - 1.98 0.63 - 1.67 0.57 - 1.38 0.81 - 2.55 0.84 - 2.25 0.83 - 1.91
Max. positive pressure bar 8 11 15 8 11 15
Nominal motor output kW 11 15
Dimensions W x D x H mm 750 x 895 x 1,260 750 x 895 x 1,260
Compressed air connectionG 1 G 1
Sound pressure level dB(A) 67 68
Weight kg 329 337

T-SFC version

ModelSK 22 T SFC SK 25 T SFC
Working pressure bar 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.62 - 1.98 0.63 - 1.67 0.57 - 1.38 0.81 - 2.55 0.84 - 2.25 0.83 - 1.91
Max. positive pressure bar 8 11 15 8 11 15
Nominal motor output kW 11 15
Dimensions W x D x H mm 750 x 1,240 x 1,260 750 x 1,240 x 1,260
Compressed air connectionG 1 G 1
Sound pressure level dB(A) 67 68
Weight kg 404 412

Technical specifications ASK

Standard version

ModelASK 28 ASK 34 ASK 40
Working pressure bar 7.5 10 13 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 2.86 2.4 1.93 3.51 3 2.5 4.06 3.52 2.94
Max. positive pressure bar 8 11 15 8 11 15 8 11 15
Nominal motor output kW 15 18.5 22
Dimensions W x D x H mm 800 x 1,110 x 1,530 800 x 1,110 x 1,530 800 x 1,110 x 1,530
Compressed air connectionG 1¼ G 1¼ G 1¼
Sound pressure level dB(A) 65 67 69
Weight kg 485 505 525

T version

ModelASK 28 T ASK 34 T ASK 40 T
Working pressure bar 7.5 10 13 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 2.86 2.4 1.93 3.51 3 2.5 4.06 3.52 2.94
Max. positive pressure bar 8 11 15 8 11 15 8 11 15
Nominal motor output kW 15 18.5 22
Dimensions W x D x H mm 800 x 1,460 x 1,530 800 x 1,460 x 1,530 800 x 1,460 x 1,530
Compressed air connectionG 1¼ G 1¼ G 1¼
Sound pressure level dB(A) 65 67 69
Weight kg 580 600 620

SFC version

ModelASK 34 SFC ASK 40 SFC
Working pressure bar 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.94 - 3.6 0.8 - 3.14 0.88 - 2.7 0.94 - 4.19 0.8 - 3.71 0.88 - 3.18
Max. positive pressure bar 8 11 15 8 11 15
Nominal motor output kW 18.5 22
Dimensions W x D x H mm 800 x 1,110 x 1,530 800 x 1,110 x 1,530
Compressed air connectionG 1¼ G 1¼
Sound pressure level dB(A) 68 70
Weight kg 530 550

T-SFC version

ModelASK 34 T SFC ASK 40 T SFC
Working pressure bar 7.5 10 13 7.5 10 13
Flow rate Complete system at working pressure m³/min 0.94 - 3.6 0.8 - 3.14 0.88 - 2.7 0.94 - 4.19 0.8 - 3.71 0.88 - 3.18
Max. positive pressure bar 8 11 15 8 11 15
Nominal motor output kW 18.5 22
Dimensions W x D x H mm 800 x 1,460 x 1,530 800 x 1,460 x 1,530
Compressed air connectionG 1¼ G 1¼
Sound pressure level dB(A) 68 70
Weight kg 625 645