Cutter electrical parts Rotary solenoid valve 121-1490 E320B proportional solenoid valve 1211490

Third, the classification of solenoid valves

 1, direct acting solenoid valve

(Working principle of direct-acting solenoid valve)

 When the power is on, the electromagnetic force generated by the electromagnetic coil lifts the

closing piece from the seat, and the valve is called. When the power is off, the solenoid valve

disappears, the spring presses the closing part on the seat, and the valve is closed. It is characterized

by normal operation in vacuum, negative pressure and zero pressure, but the diameter is generally

not more than 25mm.

2, pilot solenoid valve

(Pilot solenoid valve working principle)

 When powered on, the electromagnetic force opens the pilot hole, the upper chamber pressure

drops rapidly, forming a low and high pressure difference around the closing part, the fluid

pressure pushes the closing part to move upward, and the valve opens. When the power is off,

the spring force closes the pilot hole, and the inlet pressure forms a low and high pressure

difference around the valve closing part through the bypass hole rapidly, and the fluid pressure

pushes the closing part to move down and close the valve. It is characterized by a high upper

limit of the fluid pressure range and can be installed arbitrarily (to be customized) but must

meet the fluid pressure difference condition.