Gate Valve can be divided into normally closed solenoid valves and normally open solenoid valves according to the different open and closed states when the power is off. For normally closed solenoid valves, after the coil is energized, the armature first drives the auxiliary valve plug to lift up under the action of electromagnetic force, and the fluid on the main valve cup flows through the auxiliary valve, reducing the pressure on the main valve cup.
When the pressure on the main valve cup is reduced to a certain value, the armature drives the main valve cup and uses the pressure difference to open the main valve cup, and the medium flows. After the coil is powered off, the electromagnetic force disappears, and the armature falls back to its original position due to its own weight. At the same time, relying on the medium pressure, the main and auxiliary valves can be tightly closed.
Normal open
Solenoid Valve, line After the coil is energized, due to the suction, the moving iron core moves down, pressing the auxiliary valve plug down, the auxiliary valve is closed, and the pressure in the main valve cup rises. When the pressure rises to a certain value, the upper and lower pressure differences of the main valve cup are the same. Due to the electromagnetic force, the moving iron core loses the main valve cup, presses the main valve seat, and the valve is closed.
When the coil is de-energized, the electromagnetic suction is zero, the auxiliary valve plug and the supporting iron core are lifted up by the spring, the auxiliary valve opens, and the fluid on the main valve cup flows away through the auxiliary valve, reducing the pressure on the main valve cup. When the pressure on the main valve cup is reduced to a certain value, the pressure difference is used to push up the main valve cup, the main valve opens, and the medium flows.
