The pilot type solenoid valve is composed of a pilot valve and a main valve, and the two are connected by a channel. When the solenoid valve coil is energized, the movable iron core and the static iron core are attracted to open the pilot valve hole, and the pressure of the spool back cavity is passed through the pilot valve. The hole flows to the outlet. At this time, the pressure in the back chamber of the valve core is lower than the inlet pressure, and the pressure difference is used to move the valve core away from the main valve port, and the medium flows from the inlet to the outlet. When the coil is de-energized, the moving iron core is separated from the static iron core, and the pilot valve hole is closed. The pressure of the back cavity of the valve core is gradually balanced with the inlet pressure by the inlet pressure, and the valve core is tightly closed by the spring force.
Pilot Solenoid Valve Features: The upper limit of the fluid pressure range is high and can be installed arbitrarily (customized) but must meet the fluid pressure difference conditions.
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Longkou Kangxie Medical Instrument Co., Ltd , https://www.lkkangxiemedical.com