alibaba china supplier Air and liquid water solenoid valve 

I.USE

This valve is suitable in by the water or other was mad the liquid is the actuating medium, may automate actuating medium pipeline and so on control or long-distance control air
, water, fat liquor body make-and-breaks. Because this valve uses the rubber seal, therefore decreases greatly to the actuating medium cleanliness request,
 has opens shuts the news fast, reliable higher characteristic.

II. Structure principle

This valve two times operates the valve for the diaphragm type the forerunner type solenoid valve, its structure mainly is composed by the vice-valve and the main valve.
According to power failure when locates the condition difference, may divide into often shuts the solenoid valve and often operates the solenoid valve. Often shuts the solenoid valve, Chang Weishi, moves the ferrite core to seal up the vice-valve port, the valve cavity internal pressure is balanced, vice-valve, main valve port seal.When the coil circular telegram, will have the electromagnetic force to move the ferrite core to attract, the vice-valve will open, in outside the main valve cavity medium self-directed valve port will release, so that about the main valve diaphragm will produce presses
 the strength to be bad, the diaphragm is picked up rapidly, main valve port opening, the valve will assume the circuit condition. When the coil power failure, magnetic field vanishing, moves the ferrite core to reposition, seals up the vice-valve port, subsequently the vice-valve diaphragm epicoele pressure rise, the main valve diaphragm presses to the valve seat, the valve assumes the shutting down shape condition.
Often operates the solenoid valve, when coil circular telegram, has the magnetic field strength, the armature moves in magnetic force function one after next, impels under the vice-valve valve cup to move,
 the vice-valve closure, about the differential pressure trend is equal along with the main valve valve in, the main valve diaphragm approaches the packing surface by the spring strength and from the heavy pressure, valve
 gate shutting down. After the coil power failure, the magnetic force is a zero, the armature and the vice-valve valve cup as a result of the spring function rise, the vice-valve opens, inmain valve diaphragm epicoele medium after vice-valve escape, drop of pressure, after the pressure drop to certain value, the main valve raises upwardly by about differential pressure function, the main valve opens, valve opening.