In this section we will read about
- Current to pressure Converter (I/P Converter)
- Control Valve positioner or Pneumatic positioner
- Parts of a pneumatic control valve positioner
- Control Valve and its types
- Solenoid Valve
- Pneumatic Cylinder
- Butterfly Valve
- Globe Valve or pneumatic globe valve
- Parts of a Control Valve
- Pneumatic globe valve types
- Control Valve Characteristics
- Class of a control valve
- Pressure Transmitter
- pressure transmitter working principle
- Pin type pressure Transmitter
- Pressure Transmitter connections
- pressure transmitter signal checking
- Flow transmitter
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.
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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