Sanhua has developed its latest generation of Variable Speed Drives which are dedicated to hermetic scroll and rotary compressors and designed for applications using natural refrigerants such as CO2 (R744) and Propane (R290).
SD2 Variable Speed Drives have been developed to operate with BLDC refrigeration compressors considering the most critical point such as operating envelop, oil management, temperatures, torque to ensure the best reliability ever with max. efficiency over 95 per cent.
SD2 drives are adapted for Heat pumps with heating capacity up to 46kW/compressor or for refrigeration racks and condensing units used in small stores with a cooling capacity up to 35kW/compressor.
SD2 drives used together with our SANHUA Electronic Expansion Valves provides a stable evaporating temperature and reduces compressors short cycles. A stable control allows higher evaporating temperature and lower condensing pressure, these points are key to save energy and possible with SANHUA’s SD2 and EEVs control.