What is a solenoid valve and why are they important?

A solenoid valve is also called electrically operated valve. Pneumatic solenoid valves are activated the moment electric current is put into the coil of a solenoid. This creates an electromagnetic field around the coil. 

This magnetic field allows the solenoid coil to move and causes the valve's valve to open or close. Valves are therefore perfect for quickly passing, blocking or directing water, air or oil through. Solenoid valves are used to control pneumatic cylinders, among other things.

One of the main advantages of solenoid valves is their versatility. They are available in different sizes and controls, making them suitable for a wide range of applications.

Solenoid valves: this is how they work in practice

A solenoid valve consists of two main components:

• A solenoid
• A valve body.

A solenoid is a coil composed of copper wire wrapped around a hollow cylinder. When current passes through the wire, a magnetic field is created around it. The strength of the magnetic field depends on the current flowing through the coil.

The solenoid is responsible for valve operation. In contrast, the valve body is responsible for controlling the fluid/air flow. 

A valve body consists of an inlet port, an outlet port and a flow passage connecting the two. Depending on the type of valve, this can also be 2 exhaust ports or 2 flow passages.

Important steps in connecting a solenoid valve to an air connection

Connecting a solenoid valve requires attention to detail and the use of proper technique. Here are some steps and points of interest:

Step 1: Attach the air connection
Make sure the location where the air enters is connected to the correct port on the solenoid valve. Use the arrow on the valve body to determine which direction the air flow should be.

Step 2: Connect the outlet
The outlet port of the solenoid valve is where the air is discharged again. Connect this port to the appropriate outlet.

Step 3: Electricity
Connect the solenoid valve to an appropriate electrical supply, often with a connector or by turning the connection screw.

Step 4: Check
Test the connection and operation of the valve.

Do you need anything else to connect a solenoid valve?

My solenoid valve is not closing, now what?

When a solenoid valve does not close, dirt is often the culprit. Other causes may include damaged coil, electrical problems, or a pressure differential. We'd like to explain this in more detail below:

• Dirt in the valve: dirt, scale or other particles can block the valve.
• Damaged coil: a defective coil can prevent the valve from activating properly.
• Electrical problems: an incorrect voltage or a faulty electrical connection can cause the coil to malfunction.
• Pressure difference: a large pressure difference between the input and output of the valve can cause it to not close properly.

Find your pneumatic solenoid valve at Pneuparts