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ASK SeriesRotary Screw Compressor

ASK Series compressors give today's users maximum availability and efficiency

Regardless of their size, ASK Series rotary screw compressors meet and exceed the needs of AEP Compressed Air customers.  They deliver more compressed air for less power consumption in an easy to use and maintain system.

Key benefits of the ASK Series:

  • Class leaders with impressive performance - this range represents true class leaders and gives our customers an impressive performance capability.  HPC design engineers have achieved this through continued development of the airend and further optimisation of the SIGMA PROFILE.  Enhancements to both the rotors and low speed operation compared with previous models has enabled free air delivery
  • Low energy consumption - Premium efficiency IE3 motors and the SIGMA CONTROL 2 compressor controller contributes significantly to the ASK performance increase.  Its unique cooling system has also helped push the boundaries of efficiency even further.
  • Innovative and optimised design - each of the ASK compressor models share a user-friendly and logical design throughout their construction.  For example, the closure door design enables excellent visibility of the system components for access to maintenance and service points.  When closed, these doors complete the sound-absorbing system enclosure enabling operational sound levels to be kept to a minimum.  Two intake openings provide a separate airflow for high efficiency cooling of the compressor and drive motor.  And finally, the HPC ASK series compressor systems are impressively compact making them the ideal solution where space is limited.

ASK Series at a glance ...

ASK Standard Series - quality is in the details 


At the heart of every SK system lies a premium quality airend featuring KAESER's SIGMA PROFILE rotors.  Operating at low speed, these airends are equipped with flow-optimised rotors for superior efficiency.


The SIGMA CONTROL 2 ensures efficient control and system monitoring.  The large display and RFID reader provide effective communication and maximum security.  Multiple interfaces offer exceptional flexibility, whilst the SD card slot makes updates quick and easy.

Maximum efficiency: IE3 motors

The use of IE3 motors became mandatory in the EU from 1st Jan 2015.  However, users had already enjoyed the benefits that these premium efficiency motors have to offer by choosing the ASK Series rotary screw compressors.

Energy-saving radial fan

Driven by an independent motor, the radial fan ensures low compressed air discharge temperatures and provides greater cooling performance with lower energy requirement.  This conforms to the efficiency requirements of EU directive 327/2011.


ASK T Series - with energy-efficient integrated dryer

Energy-saving control

The integrated refrigeration dryer in ASK T units provides high-efficiency performance thanks to its energy-saving control.  The dryer is therefore active only when compressed air actually needs to be dried.  This approach consequently achieves the required compressed air quality with maximum efficiency.

Efficient refrigeration dryer

With its efficient rotary compressor and corrosion resistant aluminium heat exchanger, the integrated refrigeration dryer for ASK packages was designed with absolute energy efficiency in mind.

Refrigeration dryer with ECO DRAIN

The refrigeration dryer is equipped with an automatic ECO DRAIN condensate drain.  This advanced level controlled drain eliminates the compressed air losses associated with solenoid valve control.  The result is energy saving and considerable enhancement of the reliability of the compressed air supply.

Exceptional compressed air quality

As the compressor and dryer are thermally shielded from one another, the dryer remains unaffected by heat from the compressor.  This means it can operate at peak performance at all times to provide quality, dry compressed air.


ASK SFC Series - Modular design - dependable performance

Optimised specific power

In any compressed air installation, the variable speed controlled compressor operates longer than any other unit within the system.  ASK SFC models are therefore designed to provide maximum efficiency without running at extreme speeds.  This saves energy, maximises service life and enhances reliability.

Precision pressure control

Volumetric flow rate can be adjusted within the control range according to pressure to suit actual compressed air demand.  As a result, operating pressure is precisely maintained to within ±0.1 bar.  This allows maximum pressure to be reduced which saves both energy and money.


Housed in its own integrated and insulated control cabinet, the SFC frequency converter is shielded from heat from the compressor.  A separate fan keeps operating temperatures in the optimum range to ensure maximum performance and service life.

EMC Certified

The SFC control cabinet and SIGMA CONTROL 2 are tested and certified as individual components to EMC directive EN 55011, Class B, for mixed zones.  The compressor system as a whole is also tested and certified accordingly.