Rotary screw compressors 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.
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SX 3 Model 3 Horsepower (hp) Nominal Motor Output Standard Version Rotary Screw Compressor
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SX 4 Model 4 Horsepower (hp) Nominal Motor Output Standard Version Rotary Screw Compressor
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SX 5 Model 5 Horsepower (hp) Nominal Motor Output Standard Version Rotary Screw Compressor

SX 5 Model 5 Horsepower (hp) Nominal Motor Output Standard Version Rotary Screw Compressor
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SX 7.5 Model 7.5 Horsepower (hp) Nominal Motor Output Standard Version Rotary Screw Compressor
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SX 3 T Model 3 Horsepower (hp) Nominal Motor Output T Version Rotary Screw Compressor
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Description N/A Rotary screw compressors 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.
Brands N/A Kaeser Compressors
Model N/A SX 3 N/A SX 4 N/A SX 5 N/A SX 7.5 N/A SX 3 T
Working Pressure N/A 125 psi160 psi N/A 125 psi160 psi217 psi N/A 125 psi160 psi217 psi N/A 125 psi160 psi217 psi N/A 125 psi160 psi
Complete System Flow Rate at 125 Pound Per Square Inch (psi) Working Pressure N/A 12 acfm N/A 16 acfm N/A 21 acfm N/A 28 acfm N/A 12 acfm
Complete System Flow Rate at 160 Pound Per Square Inch (psi) Working Pressure N/A 9 acfm N/A 13 acfm N/A 17 acfm N/A 24 acfm N/A 9 acfm
Complete System Flow Rate at 217 Pound Per Square Inch (psi) Working Pressure N/A N/A 9 acfm N/A 13 acfm N/A 19 acfm N/A
Maximum Positive Pressure at 125 Pound Per Square Inch (psi) Working Pressure N/A 125 psi
Maximum Positive Pressure at 160 Pound Per Square Inch (psi) Working Pressure N/A 160 psi
Maximum Positive Pressure at 217 Pound Per Square Inch (psi) Working Pressure N/A N/A 217 psi N/A 217 psi N/A 217 psi N/A
Nominal Motor Output N/A 3 hp N/A 4 hp N/A 5 hp N/A 7.5 hp N/A 3 hp
Width N/A 23 in
Depth N/A 25 in N/A 25 in N/A 25 in N/A 25 in N/A 36 in
Height N/A 38 in
Compressed Air Connection Thread Size N/A 3/4 in
Compressed Air Connection Thread Type N/A National Pipe Thread (NPT)
Sound Pressure Level N/A 61 dBA N/A 62 dBA N/A 63 dBA N/A 66 dBA N/A 61 dBA
Weight N/A 309 lb N/A 309 lb N/A 320 lb N/A 342 lb N/A 408 lb
Ambient Temperature N/A Up to +115 ºF
Additional Information N/A 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 determine which model is the perfect solution for you.
Advantages N/A
  • 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 is quick and simple.
  • Exceptionally quiet - The soundproofed housing reduces operational noise to a minimum. Normal conversation can take place right next to the compressor.
Low Life Cycle Costs N/A Our comprehensive approach to life cycle cost management: Superior efficiency, easy operation, service-friendliness, and a global service and consulting network with fast response times.
Complete Unit N/A
  • Ready-to-run
  • Fully automatic
  • Super soundproofing
  • Vibration dampening
  • Powder-coated panels
  • Easy access to all service points
Airend N/A
  • Single stage with cooling fluid injection for optimal rotor cooling
  • Genuine KAESER rotary screw airend with energy-saving SIGMA profile
  • Multi-ribbed, single belt drive
Drive N/A Maintenance-free elastic belt
Cooling Fluid and Air Circuit N/A
  • Dual flow fan and separate air flow channels for motor cooling, the fluid/compressed air cooler, the control cabinet and interior of the machine
  • Dry air filter
  • Pneumatic inlet and venting valves
  • Cooling fluid separator tank
Heat Recovery (HR) (Option) N/A Optionally available with integrated heat recovery system (stainless steel plate-type heat exchanger)
Integrated Refrigerated Dryer N/A N/A N/A N/A N/A
  • CFC-free
  • R-513A refrigerant
  • Fully insulated
  • Hermetically sealed refrigerant circuit
  • Refrigerant compressor with energy-saving, cycling shut-down feature
  • Hot gas bypass control
  • Zero loss electronic co
Electric Motor N/A
  • Premium efficiency IE3
  • Totally enclosed fan-cooled motor (TEFC)
  • Class F insulation for greater power reserve
Electrical Components N/A
  • Control cabinet to IP 54
  • Control transformer
  • Siemens frequency converter (SFC models)
  • Automatic wye-delta starter
  • Overload relays
  • Control cabinet ventilation
Sigma Control 2 N/A
  • "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
  • Dual, Quadro, Vario, Dynamic, and Continuous control included as standard
  • Interfaces: Ethernet
  • Additional optional communications modules for: Profibus DP, Modbus, Profinet, DeviceNet, and EtherNet/IP
  • SD card slot for data-logging and updates
  • RFID reader
  • Web server
Refrigerated Dryer N/A N/A N/A N/A N/A ABT 4
Power Consumption N/A N/A N/A N/A N/A 0.3
Pressure Dew Point N/A N/A N/A N/A N/A 37 ºF
Refrigerant N/A N/A N/A N/A N/A R-513A
Global Warming Potential N/A N/A N/A N/A N/A 631
Refrigerant Volume N/A N/A N/A N/A N/A 0.38 lb
Refrigerant Mass as CO2 Equivalent N/A N/A N/A N/A N/A 0.1 t
Hermetic Refrigeration Circuit N/A N/A N/A N/A N/A Yes
Note N/A The refrigerated dryer series contains fluorinated greenhouse gases. The refrigerant in all models has been switched from R-134a (GWP 1430) to R-513A (GWP 631) as of 2019.