Usability: The compressor unit can for use in many kinds of refrigerants such as R22,R134a,R404,R407c. The same serial compressor unit,is suitable for different applications. Excellent functions: Equipped with oil separator,high and lower pressure controller,solenoid valve,filter drier, high and lower pressure gauge,big volume receiver and high efficient condensing units, it is best match unit. Special design for the construction: Construction compact,equipped with protect cover, stability ,service life long and good looking. Excellent design for the driving parts and up to best reduced the vibration result. The reasonable suction device in order to compressor cylinder has completed cooling. According to different applications to equipment with high efficient W pattern rifle bored copper, it can be reduced overall dimension and add transfer-heating result. BFBV20 over 56H(Y)compressor unit adopted split wire motor,it can use small current to start running. Reliability protectors: The motor uses electronic module protector or advanced heat protector to control the temperature. BFBV20 over 84.5H(Y)compress unit or adopted oil different pressure controller to ensure will lubrication system and equipped with auto-proctor of high pressure release valve. Crankcase heater fitted to prevent liquid migration.