The use of solenoid valves

In the continuous development of the solenoid valve today, the value of the solenoid valve is also constantly improve. Solenoid valve for the step-by-step direct pilot solenoid valve, according to the power off when the open and close the state can be divided into normally closed solenoid valve and normally open solenoid valve. Normally closed solenoid valve, the coil is energized, the armature under the action of electromagnetic force to drive the auxiliary valve plug, the main valve valve cup fluid flow through the sub-valve, reducing the role of the main valve cup pressure, 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 differential pressure to open the main valve cup and the medium flows. After the coil is de-energized, the electromagnetic force disappears and the armature is reset by the weight drop. At the same time rely on the media pressure, the main and deputy valve can be closely closed. Normally open solenoid valve, coil power after the role due to suction, moving core down, the deputy valve valve plug pressure, deputy valve closed, the main valve cup pressure rise, when the pressure rose to a certain value, the main valve cup The upper and lower pressure difference, due to the role of electromagnetic force, moving the core to push the main valve cup, the main valve seat, the valve closed. When the coil is de-energized, the electromagnetic suction is zero, the sub-valve plug and the moving core are lifted upwards due to the spring action, the sub-valve is opened and the fluid on the main valve cup is flowed through the secondary valve, reducing the effect on the main valve cup Of the pressure, when the main valve on the cup to reduce the pressure to a certain value, the use of pressure to push the main valve cup, the main valve open, the media circulation.