Kaeser FSD.3 rotary screw compressors

Kaeser Compressors has announced its latest generation FSD series rotary screw compressors, enabling air cooling of rotary screw compressors for larger drive powers over 250 kW.

The radial fan in Kaeser’s cooling system draws in ambient air directly through the cooler without being pre-warmed to ensure optimum cooling performance. FSD compressors can therefore be used in ambient temperatures as high as 45°C. All FSD models are also optionally available as water-cooled versions.

In every model, the thermostat-controlled radial fan for fluid cooling helps achieve further energy savings. It is integrated into Kaeser’s Electronic Thermo Management (ETM) system, which regulates oil temperature to ensure a safe and consistent differential from the dewpoint temperature, thereby avoiding unnecessarily high compressed air discharge temperatures and leading to additional energy savings. With the heat recovery option, a second ETM system assures optimised usage of the available heat energy.

This optimised efficiency results from the refined screw compressor blocks equipped with high efficiency and flow optimised Sigma Profile rotors. In addition, the screw compressor block is directly driven by an energy-saving motor that operates at a low speed of 1490 rpm. Direct drive reduces energy consumption, maintenance requirement and sounds levels.

The FSD.3 series rotary screw compressors are available with drive power 250 and 315 kW, working pressures 7 to 15 bar and free air deliveries from 29.2 to 58 m³/min.