When you are going to connect a pneumatic system, you quickly come to an important point of attention: connecting a solenoid valve. A well-functioning pneumatic valve is important for the efficient operation of a pneumatic system.

At Pneuparts, we are happy to help you on your way with expert advice on how to connect a solenoid valve . In this knowledge article, we explain everything about the connection, practical tips and what to look out for when connecting a solenoid valve.

What is a solenoid valve and why are they important?

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

This magnetic field allows the solenoid coil to move and allows the valve of the valve to open or close. The valves are therefore perfect for quickly allowing water, air or oil to flow through, block or direct. Solenoid valves are used, among other things, to control pneumatic cylinders.

One of the main advantages of solenoid valves is their versatility. They are available in a variety of sizes and controls, ensuring that they are suitable for a wide range of applications.  

Solenoid valves: this is how they work in practice

A solenoid valve consists of two main parts:

• A solenoid 

• A valve body

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

The solenoid is responsible for the functioning of the valve. In contrast, the valve body is responsible for controlling the liquid/airflow. 

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

Important steps when connecting a solenoid valve to an air connection

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

Step 1: Attach the air connection

Make sure that the place where the air enters is connected to the correct port of the solenoid valve. Use the arrow on the valve body to determine which direction the airflow should be.

Step 2: Connect the outlet

The exhaust port of the solenoid valve is the place where the air is discharged again. Connect this port to the appropriate outlet.

Step 3: Electricity

Connect the solenoid valve to a suitable 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?

Yes, fittings, pipes and electrical connections are required to connect a solenoid valve to your pneumatic system. Finally, you also need a control device to operate the valve, this can be a switch or a control panel.

My solenoid valve won't close, what now?

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

• Dirt in the valve: dirt, limescale or other particles can block the valve.

• Damaged coil: A faulty coil can cause the valve to stop properly activated.

• Electrical problems: Incorrect voltage or a faulty electrical connection can cause the coil to malfunction.

• Pressure difference: A large pressure difference between the entrance and exit of the valve can prevent it from closing properly.

Find your pneumatic solenoid valve at Pneuparts

We are happy to advise you on which solenoid valve best suits your application. Do you want to know more or do you have any questions? Feel free to contact us and we are ready to help you further.