ASD Series
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Rotary Screw Compressors ASD Series With the world-renowned SIGMA PROFILE Flow rate 0.89 to 6.39 m³/min, Pressure 5.5 to 15 bar

ASD – Even more efficient With its latest generation of ASD (ASD.4) series rotary screw compressors, KAESER KOMPRESSOREN once again pushes the boundaries of compressed air efficiency and availability. Not only do these optimised systems deliver more compressed air for less energy, they also combine simple operation and maintenance-friendliness with exceptional versatility and environmentally responsible design. Perfect partners The newly improved ASD systems save energy in a number of ways: equipped with further-refined SIGMA PROFILE rotors, the airends are controlled and monitored by the...

Service-friendly design

Uncompromising efficiency Save energy with the SIGMA PROFILE SIGMA CONTROL 2: Optimum efficiency At the heart of every ASD system lies a premium-quality airend featuring Kaeser’s SIGMA PROFILE rotors. Flowoptimised for impressive performance, these advanced rotors enable ASD systems to set new standards in terms of specific package input power. The internal SIGMA CONTROL 2 controller ensures efficient compressor control and monitoring at all times. The large display and RFID reader assure clear communication and maximum security. Variable interfaces enable seamless networking capability,...

Premium compressed air quality with add-on dryer Power consumption (kW) ▀ Power consumption: KAESER add-on dryer ▀ Power consumption: refrigeration dryer with continuous control ▀ Energy savings: KAESER add-on dryer Energy-saving control Dependable KAESER centrifugal separator The integrated refrigeration dryer in ASD T units provides highly efficient performance, thanks to its energy-saving control. The dryer is therefore only activated when compressed air drying is actually required: as a result, the desired compressed air quality is achieved with maximum energy efficiency. A KAESER...

High-efficiency drive system: Efficiency class IES2 < 20% losses than benchmark > 20% losses than benchmark The new EN 50598 standard The European Ecodesign Standard EN 50598 defines the requirements for drive systems in electrically driven production machines. It specifies a required level of system efficiency, taking into account losses from the motor and frequency converter. With 20% lower losses compared to the benchmark, KAESER systems meet this standard with ease. Maximum energy efficiency For frequency-controlled systems in the ASD series, KAESER meets the IES2 efficiency standard,...

Speed-controlled compressor with synchronous reluctance motor Precision pressure control The flow rate can be adjusted within the control range, according to pressure. Working pressure is kept constant to within ±0.1 bar. This allows maximum pressure to be reduced, thereby saving energy and costs. Durable and service-friendly: The rotors in the synchronous reluctance motor do not contain aluminium, copper or rare earth magnetic materials. This makes the bearings and rotors as easy to replace as those in asynchronous motors. The functional principle keeps heat losses in the motor to a...

Maximum efficiency with frequency-controlled synchronous reluctance motor High-efficiency synchronous reluctance motor High-performance frequency converter This range of motors combines the advantages of both asynchronous and synchronous motors, all within a single drive system. The rotors contain no aluminium, copper or rare earth magnetic materials. They are constructed from electrical steel, feature a special profile and are arranged in series. This makes the drive highly durable and easy to service. The Siemens frequency converter features a control algorithm specifically adapted to the...

Your benefits at a glance: Best system efficiency: IES2 as per EN 50598 Maximum energy efficiency throughout the control range Durable, service-friendly drive system Advanced drive technology Minimal operating costs, high productivity and availability EMC-certified complete system Asynchronous motor Synchronous reluctance motor Performance Applications for compressors with variable speed control and synchronous reluctance motor A recent study shows that the typical compressed air consumption profile is in the range of 30–70% of the maximum. This is where a rotary screw compressor equipped...

Ambient heat Total electrical power consumption Compressed air energy potential Approx. 5 % Heat dissipation from the drive motor Heat dissipated by the compressor into the ambient air Approx. 76 % Heat energy recoverable through fluid cooling Heat remaining in the compressed air Heat energy recoverable through compressed air cooling Recoverable heat energy Example savings calculation for hot air heat recovery for fuel oil (ASD 60) Maximum available heat capacity: Calorific value per litre of fuel oil: Fuel oil heating efficiency: Price per litre of fuel oil: Cost saving: Further information...

Heat recovery system Cost-effective heating Heat recovery simply makes sense Space heating with hot exhaust air Amazingly, 100% of the electrical drive energy supplied to a compressor is converted into heat energy. Of that heat, up to 96% can be recovered and reused for heating purposes. Use this potential to your advantage! Heating made simple: Thanks to the radial fan with high residual thrust, (hot) exhaust air can be easily ducted away to spaces that require heating. This simple process is thermostatically controlled. Process, heating and service water Thanks to the plate-type* heat...

Heat recovery Energy-saving, versatile and flexible Required heating energy (%) PTG plate-type heat exchanger system PTG plate-type heat exchangers consist of a package of pressed stainless steel plates. They combine excellent heat exchange characteristics with exceptionally compact design. PTG heat exchangers can be integrated into existing hot water supply systems and are suited for industrial applications. It goes without saying that heating is essential during the winter months. However, it is also needed to a greater or lesser extent at other times of the year, such as in the spring...