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The Main Category of Solenoid Valve

Solenoid Valve from the principle divided into three categories:
Direct acting solenoid valve
Principle: power, the Electromagnetic Coil generates an electromagnetic force to the closure member is lifted from the valve seat, the valve opens; when power is off, the electromagnetic force disappears, the spring pressure in the valve closure member, the valve closes.
Features: can work in the vacuum, negative pressure, zero pressure, but the path is generally not more than 25mm.
Step direct acting solenoid valve
Principle: It is the principle of a direct-acting and pilot-operated combination, when there is no pressure inlet and outlet, the power, the electromagnetic force directly to the pilot valve and the main valve closure member followed up, and the valve opens. When the inlet and outlet reaches the starting pressure, the power, the electromagnetic force pilot valve, the main valve chamber under increased pressure, the chamber pressure drops, which use pressure to push up the main valve; power, the pilot valve with a spring force or medium pressure to promote off pieces, moving down, the valve closes.
Features: zero pressure or vacuum, high pressure can also be * action, but power is larger, the requirements must be mounted horizontally.
Pilot solenoid valve
Principle: power, the electromagnetic force open the pilot hole, the upper chamber pressure drops rapidly, around the closure member is formed on the lower high pressure, fluid pressure to promote the closure member is moved upward, the valve opens; when energized, the spring force of the pilot hole is closed, the inlet pressure through the bypass hole quickly shut the valve chamber is formed around the low pressure on the high fluid pressure to promote the closure member is moved downward to close the valve.
Features: high fluid pressure upper limit can be any installation (to be customized) but fluid pressure conditions must be met.
2, solenoid valves from distinguish between different valve structure and materials with the principles on the on the branch is divided into six categories: direct-acting diaphragm structure, step by step direct-acting diaphragm structure, the pilot diaphragm structure, direct-acting piston structure, stepwise linear movement structure, the pilot piston piston arrangement.

3, the solenoid valve according to functional classification: water Electromagnetic Valve, steam solenoid valves, refrigerant solenoid valve, cryogenic solenoid valve, gas valve, fire solenoid valve, solenoid valve ammonia, a gas solenoid valve, liquid solenoid valve, miniature solenoid valves, pulsed electromagnetic valves, hydraulic solenoid valve normally open solenoid valve, oil solenoid valve, DC solenoid valves, high pressure solenoid valve, explosion-proof solenoid valve.


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