Main supply solenoid valve,pressure control(pressure switch),differential pressure control, manual stop valve, filter drier(eliminator), expansion Valve, flow switch, moisture indicator and all other kinds of refrigerator control elements. Moreover, 2W solenoid valve,air source processing unit,timer-water control solenoid valve and all kinds of other pneumatic control elements.They are widely used for the accessory elements of refrigerator sets,central air-conditioning,hot pump sets,compressor sets,washing machine,boiler and other machinery