Crankcase heaters are mainly used in new refrigeration semi-hermetic compressors and remanufactured semi-hermetic compressors. The crankcase heaters can match with Bitzer type of compressor S6F,S6H,S6G,4TCS,6F,6G,4FC,6H,4EC,4NCS,4G,4DC,4CC,4H,4PCS…