Shanghai Ren public ZCS water solenoid valve 2W stainless steel solenoid valve solenoid valve brass gas solenoid valve

Fluid Machinery Co., Ltd. Shanghai-public (a), direct acting solenoid valve principle: power, the electromagnetic coil to generate an electromagnetic force the closing member is lifted from the valve seat, the valve opens; when power, the electromagnetic force disappears, the spring force to close member pressed against the seat, the valve is closed. Features: can work in the vacuum, negative pressure, zero pressure, but generally does not exceed diameter 25mm. (Ii) step by step direct acting solenoid valve principle: it is the principle of a direct-acting and pilot-operated combination, when the inlet and outlet pressure ≤0.05Mpa, when energized, the electromagnetic force directly to the pilot valve and main valve Close members turn up, and the valve opens. When the inlet and outlet pressure> 0.05Mpa, when energized, the electromagnetic force to open the pilot valve, the main valve chamber under increased pressure, the chamber pressure drops, to take advantage of the upward pressure of the main valve open; power, the pilot valve and the main 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 work reliably, but power is larger, requiring vertical mounting. (C) Pilot solenoid valve Principle: power, the electromagnetic force open the pilot hole, the rapid decline in the upper chamber pressure around the closure member is formed on the lower parts of high pressure, pushing the closure member is moved upward, the valve opens; power , the spring force of the pilot hole closed, the inlet pressure through the bypass hole quickly into the upper chamber closing valve member is formed around the high pressure low, pushing the closure member is moved downward to close the valve. Features: upper limit fluid pressure is high, but the fluid pressure conditions must be met.