Solenoid valve (also called Electromagnetic solenoid valve) is an electrically controlled valve,  it consist of two main parts – the valve body and the solenoid (coil). The solenoid is composed of a wound copper wire that surrounds a core with a movable closing plunger. The solenoid-plunger assembly is the valve actuator responsible for opening and closing the valve. The magnetic field exerts an upwards force on the plunger opening the orifice. This is the basic principle that is used to open and close solenoid valves.This actuator can be arranged in such a way that the plunger action can either open or close only. There is no intermediate, or in-between position, so there is no way for a solenoid to throttle flow.

Solenoid valves are used wherever fluid flow has to be controlled automatically. They are being used to an increasing degree in the most varied types of plants and equipment. The variety of different designs which are available enables a valve to be selected to specifically suit the application in question.

Solenoid Valve

Solenoid Valve Operation