Skip to main content

DSD Series

Once again, the boundaries of compressed air efficiency and availability are pushed with the latest generation of DSD series rotary screw compressors. This series of class-defining compressors is perfect for AEP customers who are looking for an intelligent design solution with enhanced ease of operation and serviceability. With a distinctive, modern appearance, these rotary screw compressors are the complete package.

Key benefits of the DSD Series include:

  • Energy savings as standard The flow-optimised and further refined SIGMA PROFILE rotors, provide the basis for exceptional energy efficiency by delivering improved specific power. KAESER’s 1:1 drive design eliminates the transmission losses associated with gear or V-belt driven systems since the motor directly drives the airend, which is paired with the use of high-performance IE4 drive motors which maximise energy efficiency. Additionally, the radial fan fulfils the energy requirements for fans, and the advanced SIGMA CONTROL 2 compressor controller achieves additional energy savings through the use of a variety of specially developed control options.
  • Perfect for high-efficiency industrial compressed air stations - The DSD series rotary screw compressors achieve unprecedented levels of efficiency and are simple to set up. This is because the internal SIGMA CONTROL 2 compressor controller offers numerous communications interfaces, which, when connected within the KAESER SIGMA NETWORK, allows seamless communication with advanced master controllers, such as KAESER’s SIGMA AIR MANAGER 4.0, and in-house centralised control systems. 
  • Service friendly - Not only are the DSD rotary screw compressors distinctive and eye-catching from the outside but on the inside, they have been innovatively designed so that the component layout achieves greater efficiency. All service and maintenance points are within easy reach and directly accessible from the front of the unit, which saves time and money and maximises compressed air system availability.
  • Electronic Thermo Management (ETM) - At the heart of the ETM is the sensor-controlled temperature control valve integrated into the cooling circuit. The ETM dynamically controls the fluid temperature; the lower the fluid temperature, the greater energy efficiency. DSD packages are equipped with a second ETM system if the heat recovery option is chosen, which enables heat recovery to be even better adapted to the customer’s exact requirements.
DSD Main Image

DSD Series - System Specifications ...

DSD Series - Energy savings in details


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

Optimum efficiency

The internal SIGMA CONTROL 2 controller ensures control and monitoring of compressor operation. The large display RFID reader provides communication and security. Variable interfaces enable networking capability, whilst the SD card slot makes updates quick and easy.

The future, today: IE4 motors

KAESER is currently the only compressed air systems provider to equip its compressors with super-premium efficiency IE4 motors as standard, thereby ensuring maximum performance and energy efficiency.

Correct temperature assured 

The innovative Electronic Thermal Management (ETM) system controls fluid temperature to prevent condensate accumulation. This enhances energy efficiency by enabling heat recovery to be precisely tailored to meet customers' exact needs.


DSD SFC Series - Compressor with variable speed drive

Optimised specific power

The variable speed rotary screw compressor is the most heavily loaded piece of equipment in every compressor station. DSD-SFC models are therefore designed to provide maximum efficiency without running at extreme speeds. This saves energy and maximises service life.

Precision pressure control

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

Separate SFC control cabinet

The SFC (SIGMA FREQUENCY CONTROL) variable speed drive is housed in its own control cabinet to shield it from heat from the compressor. A separate fan keeps operating temperatures in the optimum range to ensure maximum performance and service life.


It goes without saying that the SFC control cabinet and SIGMA CONTROL 2 are tested and certified both as individual components and as a complete system to EMC directive EN 55011 for Class A1 industrial power supplies.


DSD T Series - With integrated refrigeration dryer

Intelligent cooling airflow

The warmed cooling air from the refrigeration dryer is exhausted upwards out of the top of the system via an integrated exhaust air duct. This minimises the construction depth of the integrated refrigeration dryer.

Reduced space requirement

The refrigeration dryer in the new DSD-T packages provides a dependable supply of dry compressed air with a reduced space requirement of only 4.76 m² compared with the previous 5.73 m² (dotted line).

Refrigeration dryer operation

A KAESER axial centrifugal separator fitted with an electronic ECO-DRAIN condensate drain installed upstream from the refrigeration dryer ensures that condensate is reliably pre-separated and drained, even when ambient temperatures and humidity are high.

Minimal refrigerant requirement

The refrigeration dryers in KAESER’s new DSD-T packages require approximately a third less refrigerant than conventional dryers. This not only saves costs but is also significantly more environmentally compatible.