Chemical Industry Solenoid Valve

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3/2-Way & 5/2-Way Solenoid Valve for Chemical Industry
Solenoid valve has found wide applications to industrial production, particularly in chemical industry. Apart from applying to the on-off control of water, air, neutral gases, and other gases and liquids compatible with solenoid valve materials, the solenoid valve can also be an indispensable part (3-way, 4-way and 5-way) of the safe interlocking protection system.


3/2-Way solenoid valve working principle


The 3-way 2-position (3/2-way) solenoid valve is made up of the valve body, valve cover, electromagnetic modules, spring, and sealing structure. The sealing block at the bottom of the movable iron core can make use of the spring pressure to turn off the valve inlet.


When the power is on, there is coil excitation and the solenoid valve absorption. The sealing block with the spring above the movable iron core can turn off the exhaust port. The flow will then flow from the air inlet into the valve to realize control. When the power is off, the electromagnetic force disappears, and the movable iron core leaves the fixed iron core position and moves downwards under the action of the spring. After that, the exhaust port is opened to block the inlet. The valve will also change the on/off status because of no air supply.

4/2-Way and 5/2-Way solenoid valve working principle


The working principle of 4-way 2-position solenoid valve and the 5-way 2-position solenoid valve is the same. The only difference is that the 4/2-way solenoid valve has one outlet, while the 5/2-way one has two outlets.

As to their working principle, when the current flows by the coil, the excitation is generated, which results in absorption of the movable iron core by the fixed iron core. The movable iron core will drive the slide valve core and compress the spring to change the position of the slide valve core and change the direction of the fluids. When the coil is disconnected with power, the spring force can move the slide valve core and push back the movable iron core so that the fluid will move in the original direction.