unloader valve compressor using water oil gas about control magent valve for refrigeration

Specifications

unloader valve compressor

Features:

1. Being one of the FDF series solenoid valves ,it can be used for refrigeration, freezing and air conditioning plant.

2.Supplying  both normally closed (NC) and normally open (NO) with de-energized coils.

3.Supplying wide choices of coils for AC and DC

4.Being suitable for all fluorinated refrigerants.(including HCFC/HFC)

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5.Opening Pressure Diff.:

Pilot type                     Direct-acting type

AC:  0.05-21bar               AC:    0-21bar   

DC:  0.05-17bar               DC:    0-17bar

6. Max working pressure:40bar.

7.Temperature of medium -25°C---105°C.

8.Being also available with flange connections.

Operating principle

FDF-BFDF-Z series solenoid valve is the direct-acting type. The pull of the solenoid coil opens the valve port directly by lifting the seat disc off the valve seat.While de-energized in the coil,plug stem will drop and close the valve port because of spring force and its weight.

FDF-M series solenoid valve is pilot type valve.

While energized in coil,the coil emerges magnetic field and pick up plug stem,open the small orifice.Then the pressure in the upside of valve reduced, the pressure difference between both side of diaphragm happen,cause the diaphragm lift  to open the main orifice. While de-energized in the coil,plug stem will drop and close the small orifice because of spring force and its weight.The flow medium enter into upside of diaphragm through throttle hole,then pressure in both side of diaphragm,balances,then the diaphragm drop and close the main orifice.