Rotary screw compressors with fluid cooling

Large selection – Low life-cycle costs

Fluid-injected rotary screw compressors are used in a wide range of sectors. They are highly durable and operate reliably and efficiently even at high temperatures of up to 45 °C. The associated investment costs are comparatively low.
However, the lion‘s share of life-cycle costs is spent on energy (up to 80 %). in fact, energy costs taken over the lifetime of a compressor, add up to a multiple of investment costs. For this reason, Kaeser rotary screw compressors are equipped with energy-saving SIGMA profile airend rotors that save up to 15 % energy compared to conventional rotor profile designs.


An overview of our fluid-cooled rotary screw compressors



Connect and go – with Kaeser compressed air stations

  • Up to 22 kW
  • Space-saving combinations of rotary screw compressor, receiver and refrigeration dryer
  • Convenient control with SIGMA CONTROL

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Kaeser rotary screw compressors with belt drive provide outstanding efficiency and reliability.

  • Up to 22 kW
  • Highly-efficient power transmission thanks to automatic belt tensioning
  • With energy-saving SIGMA profile

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With belt drive

Powerful and energy-efficient: the direct drive connects the airend directly with the drive motor without transmission loss.

  • Up to 315 kW
  • Zero-loss power transmission
  • Large, slow-speed airends save additional energy.

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With 1:1 direct drive

Two complete compressor units ensure high flow rates and fail-safe performance with a compact footprint of just 7.45 m².

  • Up to 515 kW
  • Two independent compressor units in a single compact housing.
  • SIGMA CONTROL compressor controllers precisely match performance of each compressor to suit current compressed air demand.

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With two compressor units

Complete systems for PET container producers

SIGMA PET AIR complete booster system

SIGMA PET AIR combines the production of high-pressure and control air into a single, turnkey system. Transport and installation are made easier and all components are perfectly matched.

Reduce your energy costs even further!

Maximum heat recovery with rotary screw compressors.

100 percent of the energy fed to a compressor is converted into heat. Up to 96 % of this energy can be recovered and is available for reuse.