Rotary screw compressor

The DSDX rotary screw compressor range has a compact design. Motor powers of either 132 or 160 kW provide air deliveries of 24 to 30 m³/min. Both models in the range (DSDX 243 and 302) are designed for pressures up to 15 bar.

The compressors feature a modular design concept, which is claimed to provide energy savings.

The units feature a large, low-speed Sigma Profile airend (1500 rpm) equipped with flow-optimised rotors for efficiency. The rotary screw airends are powered by EPACT-rated drive motors. The 1:1 drive design eliminates the transmission losses associated with gear or V-belt driven systems, as the motor directly drives the airend. The internal PC-based ‘Sigma Control’ compressor controller has five preprogrammed control options that enable compressor performance to be matched to actual air demand.

The compressors feature a cooling system which uses a radial fan that draws cool ambient air in through the cooler. The system prevents the cooling air from being pre-warmed and, as a result, optimises the cooling effect. This, in turn, enables low compressed air discharge temperatures and increases the efficiency of downstream compressed air treatment equipment, such as dryers and filters. Sound emissions are also reduced.

Both models are available with Sigma Frequency Control (SFC). The SFC-equipped model is able to precisely adjust compressor performance to meet actual demand.

Sigma Controls can also monitor and automatically manage individual compressed air systems, such as the dryer and/or frequency control module, and enables the compressor package to be remotely accessed via a modem (teleservice). Interfaces are also provided as standard for connection to master control systems and data networks.