Structural principle of solenoid valve

Are normally closed and normally open type two. Normally closed when power was turned off, when the solenoid valve force generated when the coil power, so moving core to overcome the spring force directly with the static pull open the solenoid valve core, medium was access; When the coil power disappear when the solenoid force, an iron core under the action of the spring force reduction, direct closure of solenoid valve ports, media barrier. Simple structure and reliability, at zero pressure and micro-vacuum work. Normally open type just the opposite. If less than φ6 flow path of the solenoid valve.

step-type solenoid valve direct-acting

The valve is an open valve and open valve connected to the second one, the main valve and valve-step guide to direct the solenoid force and the pressure to open the main valve port. When the coil is energized, the solenoid force to moving core and static core pull, pilot valve open while the pilot valve mouth port located on the main valve port, and the moving core and the main spool together, this time the main valve the pressure chamber through the pilot valve port of unloading, the pressure difference and the effect of solenoid forces while the main spool to move upwards.

Open the main valve medium flow. When the coil power disappear when the solenoid force, this time moving core in the role of gravity and spring force to shut down pilot valve hole, then the balance hole in the medium into the main valve on the chamber, so that the chamber pressure increases, at this time In the spring under the pressure reset and close the main valve, medium stop. Reasonable structure, reliable action, when the work at zero pressure and reliable. Such as: ZQDF, ZS, 2W.

Indirect Pilot solenoid valve

This series solenoid valve by the pilot valve and main solenoid valve connected with the formation of channel combinations; normally closed when without power, was switched off. When the coils, the magnetic force generated by moving core and static iron core to pull, guide valve port open, medium flow to the export, then the main valve on the chamber pressure decreased, the pressure below the import side, the formation of pressure to overcome the spring resistance and the resulting upward movement, to open the main valve port of purpose, medium flow.

When the coil power, the magnetic force disappears, moving core in the spring force reduction and closure of the pilot under the mouth, this time from the balance hole into the medium, the main solenoid valve on the chamber pressure, and under the action of the spring force downward, close the main solenoid valve port. Often the opposite of open principles. Such as: SLA, DF (φ15 above caliber), ZCZ so.