Pilot solenoid valve workflow description

Solenoid valve is a step-by-step direct pilot electromagnetic valve, which can be divided into normally closed electromagnetic valve and normally open electromagnetic valve according to the different open and close states during power off.

Normally-closed solenoid valve, after the coil is energized, the armature first brings up the plug of the secondary valve under the action of electromagnetic force, and the fluid on the main valve cup flows away through the secondary valve, reducing the pressure acting on the main valve cup, when the main valve When the pressure on the 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 circulates.

After the coil is de-energized, the electromagnetic force disappears and the armature falls due to its own weight.

At the same time relying on medium pressure, the main and auxiliary valves can be closed tightly.

Normally open solenoid valve, after the coil is energized, due to suction, the moving iron core moves down, the sub valve plug is pressed down, the sub valve closes, the pressure in the main valve cup rises, when the pressure rises to a certain value, the main valve cup Like the pressure difference between the upper and lower, due to the electromagnetic force, the moving iron core pushes the main valve cup, compresses the main valve seat, and the valve closes.

When the coil is de-energized, the electromagnetic suction force is zero, the secondary valve plug and the moving iron core are lifted up due to the spring action, the secondary valve opens, and the fluid on the main valve cup flows away through the secondary valve, reducing the effect on the main valve cup. The pressure, when the pressure on the main valve cup is reduced to a certain value, the main valve cup is pushed up by the pressure difference, the main valve is opened, and the medium circulates.