unload valve compressor 1.Certificate: CE,CQC ISO9001 and UL 2.Used for ... HFC oil gas 3.Biggest client:Carrier, York Unload valve compressor Characteristicsl Complete range of solenoid valves for refrigeration, freezing and ... the diaphragm drop and close the main orifice.. unload valve compressor for CFC HCFC oil water oil gas