Solenoid valves are electromechanically operated valves that use a solenoid to control the flow of fluid or gas. They work by using a solenoid to open or close a valve, allowing or blocking the flow of air through a pneumatic circuit.

Solenoid valves are generally used to manage the flow and direction of the system. They consist of a spool attached to a ferrous metal plunger that is usually centered by a spring. 

The plunger moves within a non-ferrous metal core tube that is surrounded by a coil valve of electrical windings. The solenoid valve voltage can vary from 12-48V DC to 110-220V AC. Upon charging the coil with electricity, a magnetic field arises that propels or draws the plunger.

When are They Used?

Solenoids are used in a wide range of applications, including controlling the flow of fluid in hydraulic systems, the air in pneumatic systems, and gas in automotive systems.

In pneumatic systems, pneumatic valves are used for a variety of functions, such as controlling the direction and flow rate of air to pneumatic actuators.

What are Pneumatic Solenoid Valves?

Solenoid valves are a key component in many pneumatic systems, providing reliable and efficient control over the flow of air or gasses. They are used in a wide variety of applications, such as manufacturing processes and automotive systems. 

They can be normally open or normally closed. 

  • Normally Open:

When a normally open valve is not energized, it remains open. The valve is closed when the solenoid is activated. This type of valve is suitable for systems that require constant air or gas flow, even during power outages.

  • Normally Closed:

On the other hand, normally closed valves are closed when they are not energized. The valve opens when power is supplied to the solenoid. 

Benefits of Solenoid Valves

Here are some basic features and advantages of these types of valves:

  • Minimal pressure drop
  • Money-saving
  • Effective operation
  • Reliability
  • Durability
  • Compact design


Sometimes, it’s challenging to understand which type of valve will fit your needs because there are many types available on the market. If you need any help making an efficient purchase without regretting it later, opt for HAK Fluid Power Equipment LTD, based in Toronto, Canada.