Chicago Pneumatic Sales offers Variable Speed Drive - VSD Regulating System. Chicago Pneumatic Construction Equipment supplies industrial air compressors in the range of tank mounted air compressor, tank mounted air compressor with dryer and other series of air compressors, as well as a full range of 100% oil-free compressors. Variable Speed Drive - VSD Regulating System offers the capability to match perfectly compressor capacity to air demand. Variable Speed Drive - VSD Regulating System is able to follow the fluctuating demand by varying the speed of its drive motor by means of a frequency converter. As air demand goes down, the Variable Speed Drive - VSD Regulating System lowered the delivered flow and consequently the power consumption which is the key feature of the VSD regulating system. It reduce the energy consumption to a minimum by avoiding completely un-loaded power consumption and save up to 22% on the total life cycle cost [LCC].