Screw blowers up to 5650 cfm

Kaeser's rotary screw blowers: more air for your money

Kaeser screw blowers are available in sizes up to 335 hp and flows to 5650 cfm and use up to 35 percent less energy than conventional rotary blowers and even achieve significant energy savings compared to currently available screw blowers. Screw blowers also have significantly better isentropic efficiencies than lobe or multistage centrifugal blowers. The combination of a blower airend with high efficiency SIGMA Profile rotors, flow-optimized components, efficient power transmission and drive components, ensures exceptional wire-to-air performance and oil-free air, guaranteed by KAESER in accordance with the stringent requirements of ISO 1217.

  • High-efficiency and low-maintenance blower systems – dual shaft SIGMA blower blocks
  • Optionally available with wye-delta starter (STC) or frequency converter (SFC)
  • Plug-and-play complete package with power supply, SIGMA CONTROL 2 controller.

Municipal and industrial wastewater, flotation, and fluidization applications stand to benefit from using Kaeser screw blowers. Since these applications require blowers to run constantly, energy efficiency is a key consideration.

Your advantages

  • Maximum package efficiency:
    The combination of SIGMA Profile rotors, optimal motor-to-blower power transmission, and minimal pressure losses for all components ensures exceptional all-round efficiency.
  • Minimal pulsation in the connected process piping:
    Special silencers covering a wide frequency range significantly reduce machine and piping sound, making our screw blowers quieter than lobe, multistage centrifugals, and other screw blowers.
  • Reduced downtime:
    Highly durable components ensure reliable operation. The smart design eliminates the need for auxiliary devices (e.g. for sealing or cooling). Numerous sensors allow remote monitoring of operating status.
Blower Package Rentals
EBS rental blower package

If you need a temporary solution we also offer portable rental blowers engineered to provide robust solutions for short-term needs.


Product details



These turnkey blowers come complete with sensors, STC/SFC, SIGMA CONTROL 2, and an emergency stop push button.

Bearings and seals

  • Heavy-duty roller bearings for 100% absorption of radial forces
  • Time-tested, maintenance-free mechanical drive shaft seal on the screw blower block
  • Exceptional bearing durability thanks to optimized power distribution in the transmission
  • Oil-free air thanks to superior seal designs

IE4 motor

  • Premium-efficiency IE4 motors deliver an unparalleled level of efficiency
  • Drive motor and frequency converter with system efficiency class IES2
  • Motor winding protection
  • Available with SFC frequency controller for variable speed systems
  • Easily accessible grease fittings

Power transmission

  • Optimum power transmission efficiency
  • Reduced maintenance costs
  • Premium quality electric motors

Pulsation dampeners

  • Efficient inlet and discharge absorption silencers with a wide frequency range to dampen process air pulsations
  • Minimal sound transfer to downstream piping


SIGMA CONTROL 2 – SD card slot
  • 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: EtherNet/IP, Profibus DP, Modbus, Profinet, and DeviceNet
  • SD card slot for data logging and updates
  • RFID reader
  • Web server
  • KAESER CONNECT user interface
  • Visual representation of analog and digital input values
  • Warning and fault messages
  • Graphical display of pressure, temperature, and speed trends


  • Web browser
  • Input SC2 IP address and password
  • Access blower control via integrated web server

The user interface shows machine status in real-time, the signals at the analog and digital inputs, lists warning and fault messages, and graphically displays pressure, temperature and speed trends.

Technical specifications

The technical specifications can be found in this brochure: