Rotary screw blowers up to 250 kW

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, fluidisation and fermentation applications.

Performance data:

  • 7.5 kW to 250 kW
  • Flow rate from 3 to 160 m³/min
  • Pressure differential 300 to 1100 mbar

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!

Optimised specific package input power

Optimised 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

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, whilst 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, Annexe C or E (as applicable).

Variable speed control and EMC certification


The connection-ready version with integrated star-delta starter for constant-speed operation is equipped with a premium contactor, overcurrent relay and phase sequence monitoring. A SIGMA CONTROL 2 controller and dependable emergency stop system complete the system. Simply plug and play!


By adjusting blower speed, the SFC frequency converter allows the flow rate to be matched to the actual air demand of the process. Everything is delivered ready for immediate operation, since all programming and parametrisation is carried out at the factory.

EMC-certified complete system

It goes without saying that the SFC control cabinet and SIGMA CONTROL 2 are tested and certified for electromagnetic compatibility, both as individual components and as complete blower systems, in accordance with EMC Directive EN 55011 for industrial power supplies.

Technical specifications

The technical specifications can be found in this brochure: