Pneumatic Solenoid Valve

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Pneumatic Solenoid Valve

A solenoid valve, also known as an electrically-operated valve, is a valve that uses electromagnetic force to operate. When an electrical current is passed through the solenoid coil, a magnetic field is generated which causes a ferrous metal rod to move. This is the basic process that opens the valve and it works either directly or indirectly on the air.

Solenoid valves can be normally open or normally closed:

  • Normally Open (N/O), the valve remains open when the solenoid is not charged.
  • Normally Closed (N/C), the valve remains closed when the solenoid is not charged.
Why use a solenoid valve?

Solenoid valves eliminate the need for manual or pneumatic control of a pneumatic circuit and only require an electrical input (and air pressure for piloted valves) to operate, this makes them easy to program and install in a wide variety of applications.

What are the different types of solenoid valve?

As we shall see, solenoid valves can be split into the following broad categories: direct acting or solenoid piloted. Solenoid piloted valves can be further divided into internally or externally piloted valves, and are sometimes referred to as servo-assisted solenoid valves.


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