Rotary screw blowers up to 335 hp

Efficiency at the touch of a button

When it comes to KAESER rotary screw blowers with the SIGMA Profile, efficiency is more than just a promise. As operation-ready, “Plug-and-play” complete solutions, low-maintenance blower systems offer exceptional efficiency at the touch of a button. What is more, KAESER rotary screw blowers are designed to be especially compact, can be controlled remotely or automatically for trouble-free operation and are compatible with Industrie 4.0 systems.
Low energy consumption, coupled with the ability to operate at 100% duty cycles, ensures that KAESER rotary screw technology pays off handsomely when it comes to municipal and industrial wastewater treatment, flotation, fluidization and fermentation applications.

Performance data:

  • 10 to 335 hp
  • Flow rate from 190 to 5650 cfm
  • Pressure differential 4.4 to 16 psig

Your benefits:

  • Maximum efficiency
    KAESER rotary screw blowers are highly efficient across a broad flow rate control range. Their exceptional efficiency allows savings of up to 35% in comparison to conventional blower systems.
  • Operating data and status information in real-time
    The integrated SIGMA CONTROL 2 controller provides efficient control and monitoring of operating data and status information in real-time. A multitude of available communications channels make conducting energy audits in accordance with ISO 50001 as easy as child's play.
  • Low installation costs
    Connection-ready blowers are delivered complete with all sensors and an emergency stop switch, are ready-filled with oil and are fully certified. This significantly reduces the work and costs required for planning, installation, certification, documentation and commissioning.

Efficient drive systems

KAESER rotary screw blowers with flange motors are now equipped with Super Premium Efficiency motors (IE4 and IES2).

Rotary screw blowers from KAESER KOMPRESSOREN are now equipped with Super Premium Efficiency motors (IE4 and IES2), which stand out for their remarkable energy-saving potential thanks to extremely high levels of efficiency. Saving money has never been so easy!

Optimized specific package input power

Optimized specific package input power

The highly efficient drive system, an extra-dense screw profile and near constant specific package input power across a broad, variable-speed control range (yellow line) all combine to achieve significant energy savings across the entire operating curve.


Product details



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

Blower airend

High-efficiency blower block with SIGMA profile
  • High-efficiency blower airend with SIGMA PROFILE rotors, ensures maximum air delivery with minimal power use

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

IE3 motor

  • Premium-efficiency IE3 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.

Control and monitoring for greater efficiency
SIGMA CONTROL 2 blower controller.

The SIGMA CONTROL 2 ensures efficient blower control and system monitoring at all times. Numerous interface options enable quick and easy communication, allowing messages or setpoints and actual values for process variables to be easily connected and displayed. The SIGMA CONTROL 2 supports connection to all of the communications technologies in common use today. In the event of a remote control fault, the controller switches over to automatic mode or manual operation, while keeping the process in operation.

Guaranteed performance data
Guaranteed performance data in accordance with ISO 1217.

To ensure that the projected savings are actually achieved during operation, KAESER quotes effective overall power consumption figures, as well as the usable flow rate, in accordance with the stringent tolerances of ISO 1217, Annex C or E (as applicable).


Just plug it in, switch it on. and it's ready to go.

Turnkey blowers: Just plug in and switch on

The turnkey blowers come complete with a frequency converter or Y/D starter, SIGMA CONTROL 2, and emergency stop push button. This significantly reduces the work, costs and risks required for planning, installation, certification, documentation, and commissioning.



The version with integrated Y-Δ-starter for constant speed operation is equipped with a premium contactor, overload protection cut-out, and phase loss monitoring. Rounding off the package: the SIGMA CONTROL 2 controller and a reliable emergency stop system.



Using variable speed control, the SFC frequency converter adjusts the flow to match application air demand. Everything is ready for immediate operation, since all programming and parameterization is performed at the factory.

Technical specifications

The technical specifications can be found in this brochure: