Get to know the basics of Solenoid Valve

Solenoid Valves is an electromechanical device that is used to change the function of a valve from open to close to control the flow liquid or gas.

Here, we enlighten you on the common applications of Solenoid Valve and how it is used. We shall also go through the basic components as well as the working components of Solenoid Valves.

What are the Common Applications of the Solenoid Valve?

  • Solenoid valves are commonly used to control cylinders, fluid power motors, and larger industrial valves in fluid power pneumatic and hydraulic systems.
  • It is also used in where compressed air is not available such as factories or plants.
  • It’s also used in medical field, for the preclusion and accuracy of equipment
  • They are used in domestic washing machines and dishwashers, to control water flow (entry) into the machine.
  • Solenoid valves are used in various industrial applications such as pilot plant control loops, process control systems, calibration, general on-off control and various original equipment manufacturer applications

Get to know the Basic Components of Solenoid Valve

A solenoid valve comprises of two main elements: the Solenoid and the Valve.

  • Solenoid: A cylindrical coil of wire that serves as an electromagnet when an electric current passes through
  • Valve: Serves as a control device, controlling or directing the flow of fluid by closing, opening or partially blocking various pathways.
  • Valve Body: This is the essential part of a solenoid valve, which includes ports, seats and the opening that permits movement of fluids when the solenoid is energized or de-energized.
  • Moveable Plunger: It’s an electromagnetically inductive coil, made of a portable stainless steel. The moveable plunger is attracted by the solenoid magnetic field and slides inside the tube.
  • Seat Seal: Used to close a valve main opening. Located on the movable plunger.
  • Solenoid Tube Assembly: It’s a Cylinder in stainless steel, sealed and closed at one end. The valve has the solenoid coil tailored on the external side of the encompassing tube.
  • Plunger Spring: It’s a return spring that holds the movable plunger in position when energized and to return it to its position when de-energized.

  • Electromagnet (Solenoid coil): The electromagnet consists of copper windings (solenoid) along with a magnetic amateur when energized. It generates a magnetic flux which attracts the movable plunger.

What is the Working Principles of a Solenoid Valve?

When the Solenoid gets the electrical signal, a magnetic field is produced which causes two forces to counter one another, channelling air directly to a plunger inside the coil. It has an integral seat to forcefully open when the solenoid coil is energized.

As for when the electrical current is removed from the coil, a return spring brings the plunger back to the original closing state, hence cutting off the fluid flow.

Get to know what are the 5 types of Solenoid Valve. Read here.


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