Do you know the main categories of explosion-proof solenoid valves?

Explosion-proof solenoid valves are mainly divided into 3 categories from its principle:

1. Direct-acting solenoid valve:

Its main principle is that when energized, the solenoid will generate electromagnetic force to lift the closing member from the valve seat, and then the valve opens; when the power is off, the electromagnetic force disappears, the spring presses the closing member on the valve seat, and the valve closes.

This type of feature is that it can work normally under vacuum, negative pressure, and zero pressure, but the diameter is generally not more than 25MM.

2. Pilot solenoid valve:

Its principle is that when the power is turned on, the electromagnetic force opens the pilot hole, the pressure in the upper chamber drops rapidly, and a high pressure difference is formed around the closing member. The fluid pressure pushes the closing member to move upward and the valve opens; when the power is off, the spring force The pilot hole is closed, the inlet pressure passes through the bypass hole and the chamber quickly forms a lower and upper pressure difference around the valve closing member, and the fluid pressure pushes the closing member to move downward to close the valve.

The characteristic of this type of solenoid valve is that the upper limit of the fluid pressure range is relatively high, and it can be installed arbitrarily (customization is required) but must meet the fluid pressure difference condition.

3. Distributed direct-acting solenoid valve:

This type of solenoid is a combination of the previous two types. After it is energized, the electromagnetic force directly lifts the pilot small valve and the main valve closing member in turn, and the valve opens. When the inlet and outlet reach the start pressure difference, after power on, the electromagnetic force pilots the small valve, the pressure in the lower chamber of the main valve rises, and the pressure in the upper chamber drops, so that the pressure difference pushes the main valve upward; when the power is off, the pilot valve uses a spring The force or medium pressure pushes the closing piece and moves downward to close the valve.

See the Sample:2S stainless steel solenoid valve ( Explosion Proof )

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