Kaeser CSG-2 series dry-running rotary screw compressors

Kaeser has introduced a range of dry-running rotary screw compressors, the CSG-2 series. Available with drive powers ranging from 37 to 90 kW, these two-stage machines provide free air deliveries from 4.8 to 12.7 m³/min for pressures between 4 and 10 bar (g). Together with the existing DSG-2 and FSG-2 series, Kaeser’s dry-runner range covers free air deliveries from 4.8 to 50 m³/min, or even or 51.8 m³/min with variable speed control.

CSG-2 systems are suitable for applications where dry compression is required. Users can choose between air- and water-cooled versions and also have the option of SFC variable speed control for applications with fluctuating air demand. The air-cooled systems are designed for use in ambient temperatures up to 45°C.

Each unit contains a quality, two-stage compressor airend. The rotors are equipped with Ultra Coat, which can withstand temperatures up to 300°C. The coating is also abrasion-proof. Kaeser claims its dry-running rotary screw compressors consume no more energy after years of use than when first commissioned.

The PC-based Sigma Control 2 internal controller combines multiple control modes, a timer and base load sequencing to provide energy savings. The system provides flexibility through its numerous interfaces and plug-in communication modules, enabling easy connection to master control systems, computer networks and/or remote diagnostics and monitoring systems, such as Kaeser’s teleservice facility.

CSG-2 systems have a large display, SD card slot and RFID reader. They are powered by IE3 premium-efficiency motors and have PT100 sensors for measuring and monitoring motor winding temperature, which enables maximum motor switching frequency and reduces idling periods.