1. Principle of direct-acting solenoid valve:
Direct-acting solenoid valve, when the power is off, the solenoid valve is in a closed state. When the solenoid valve coil is energized, the electromagnetic force generated causes the moving iron core and the static iron core to attract, directly opening the valve port, and the medium flows from the inlet to the outlet. When the coil is powered off, the moving iron core is reset under the action of the return spring and directly closes the valve port, thereby cutting off the flow of the medium.
Direct-acting solenoid valves such as: ZCD, ZS, ZCX, ZCZ
Features: Simple structure, reliable action, can work normally under zero pressure difference or vacuum, can be installed in any direction, but is generally suitable for diameters below 25mm.
2. Principle of step-by-step direct-acting solenoid valve:
Step-by-step direct-acting piston solenoid valve. After the coil is energized, the moving iron core is lifted first under the action of electromagnetic force, reducing the pressure acting on the main valve piston, and then drives the main valve piston, and uses the pressure difference to cause the main valve piston to move. Fully open, media is flowing. After the coil is powered off, the electromagnetic force disappears, and the moving iron core resets due to the spring force and its own weight. At the same time, relying on the medium pressure difference, the main valve piston can be tightly closed.
Step-by-step direct-acting piston solenoid valves such as: ZBS, ZQDF, ZBSF
Step-by-step direct-acting diaphragm solenoid valves such as: ZCW, ZCH
Features: It can operate reliably even under zero pressure difference and vacuum conditions, but the power consumption is large and the diameter is subject to certain restrictions.
3. Principle of pilot solenoid valve:
The pilot solenoid valve is composed of a pilot valve and a main valve. The two are connected by a channel. When the solenoid valve coil is energized, the moving iron core and the static iron core are attracted to open the pilot valve hole, and the pressure in the back cavity of the valve core passes through the pilot valve. hole flows to the outlet. At this time, the pressure in the back cavity of the valve core is lower than the inlet pressure. The pressure difference is used to make the valve core separate from the main valve port, and the medium flows from the inlet to the outlet. When the coil is powered off, the moving iron core separates from the static iron core, closing the pilot valve hole. The pressure in the back cavity of the valve core is supplemented by the inlet pressure and gradually tends to balance with the inlet. The valve core closes the valve tightly due to the spring force.
Pilot piston solenoid valves such as: ZCB, ZCZP, ZCGL, ZCG, ZCLD
Pilot diaphragm solenoid valves such as: ZCA, ZCS, ZCY, ZCJ
Features: low power consumption, large diameter, simple structure, but can only be used in situations where there is a certain pressure difference between both ends of the solenoid valve.
4. Principle of two-position three-way solenoid valve:
Two-position three-way solenoid valve. This type of solenoid valve has three external ports A, P, and O, and has two operating conditions:
①Reversal: When the coil is energized, the moving iron core attracts the static iron core and the gas flows from P to A. When the coil is deenergized, the moving iron core closes the valve port on the valve body under the action of the spring force, and the gas flows from A to A. OExhaust.
② Diversion: When the coil is energized, the moving iron core attracts the static iron core and the gas flows from A to P. When the coil is deenergized, the moving iron core closes the valve port on the valve body under the action of the spring force, and the gas flows from A to O Connected.
Two-position three-way solenoid valve such as: Z3CD
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