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Rotary Screw Compressors
    Heat Recovery
  Standard design
      3 to 30 hp (v-belt drive)
    25 to 450 hp (direct drive)
      500 to 700 hp (direct drive)
    Integral refrigerated dryer
    Variable speed drive
    Complete package
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  Industry 4.0

Rotary screw compressor with direct drive 25-450 hp



Models: ASD / BSD / CSD / DSD / ESD / FSD series
Horsepower: 25-450 hp
Capacities:  72-2052 cfm
Standard pressures 80-217 psig

CSD75 hp rotary screw air compressor

Superior Efficiency
With Kaeser's one-to-one drive, the airend is directly connected to the motor via a maintenance-free coupling that eliminates transmission losses. Kaeser’s direct drive screw compressors deliver outstanding performance and increase energy savings. Kaeser uses oversized airends specifically selected to produce the required output in flow and pressure.  Compared to compressors using small, high-speed, gear-driven airends, the one-to-one drive provides significant savings.  

CAGI Performance Verification Program Sticker   Compare Compressor Efficiency with CAGI Data Sheets

Energy efficiency has been tested and confirmed by an independent laboratory as part of the Compressed Air and Gas Institute's Rotary Screw Compressor Performance Verification Program. Kaeser compressors are up to 30% more efficient than some competitors' models. See our CAGI data sheets.

The energy-saving Sigma Profile airend

Single-stage, flooded rotary screw airends deliver pressures up to 217 psig and feature the power-saving Sigma profile design. Airends are precision-machined and optimized in size and profile to match the airend speeds with their best specific performance. Unlike the competition, Kaeser Compressors makes many different airends so that we can apply them at their optimal speed and performance.

   Energy-saving one-to-one drive

The motor is directly connected to the airend with a one-to-one coupling, providing maximum transmission efficiency. This true direct drive eliminates complex gear drive components, along with heat and power losses. It is also maintenance-free, increasing reliability and uptime.

Sigma Control 2
The compressor control system features an industrial-based PC with update capabilities, Intel® microprocessor, and real-time operating system. Pre-loaded control profiles are available to precisely match compressor performance to air demand. A convenient SD card slot enables easy software upgrades and stores key operational parameters to minimize service costs, provide back-up capabilitiy, and offer long-term data storage for trending and analysis purposes.

Visit us at IMTS 2018

imts-engineer with laptop

IMTS is your opportunity to see Kaeser's latest compressed air solutions for precision machining and manufacturing technology. Our system experts will be on hand to show you our rotary screw compressors, packaged systems, dryer, and aluminum piping solutions.

 Meet with us at the show! 


IE4 premium efficiency motor   Premium efficiency drive motor

Super premium efficiency TEFC motors with class F insulation for extra protection from heat and contaminants. 460 or 575V 3-phase, 60 Hz. Other voltages are available.

Split cooling design

Two separate cooling air inlet zones for the coolers and drive motor ensure optimum cooling. Drawing ambient air directly across the coolers and motor through separate zones eliminates pre-heating and results in longer lubricant life and a cooler running motor. This also results in much lower approach temperatures, improving moisture separation and air quality.

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More info
with V-belt drive 3-30 hp
ASD-CSD (with direct drive 25-125 hp)
DSD - FSD (direct drive 125-450 hp)
HSD (twin direct drive 500-600 hp)
Lower Long Term Costs
State-of-the-art Manufacturing
Sigma Control 2
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