Instrumentation

Solenoid Valve

In this lesson, we will study the solenoid valve (SOV).

An SOV is an electromechanically operated valve. In the case of a two-port valve, the flow is switched on or off; in the case of a three-port valve, the outflow is switched between the two outlet ports.

Solenoid valve
                                        Solenoid valve

How does it work?

the SOV has a single input and two outputs. Air is given at the input port and when the coil is not energized air extracted from one output end and when the coil is energized air extracted from another output end. A solenoid is normally used for the opening and closing of different types of control valves. One output air is used for closing the valves and other output air is used for opening the valves.

  • Working principle

An SOV has two main parts: the solenoid (coil) and the valve. The solenoid converts electrical energy into mechanical Linear motion which, in turn, opens or closes the valve mechanically. Spring is there in the SOV when supply is given to the coil it gets energized and the spring moves which open or close the valve mechanically.

Solenoid converts electrical energy to mechanical energy and this energy is used to operate a mechanical valve that is to open, close, or to adjust in a position.

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