en English

How to check the solenoid valve and fix related problems?

Such a series of Water Solenoid valves are very popular and widely used in various industries, like mechanical equipment, textile equipment, medical equipment, food processing equipment. Most of them are large equipment and a small part will affect the whole working status when there is a problem. So, choosing a proper and good quality solenoid valve is becoming the most important thing when purchasing.

It is hard to distinguish which is good and which is bad only from the outside shape. Could you tell which of the below two pneumatic valves better?



If you want to tell me what is the difference, pls leave messages at the bottom of this article. Haha…

I will tell how to check the water solenoid valve and how to fix the related problems in an easy way in the rest part of this article.

The quality of the solenoid valve mainly depends on two parts, one is the coil and the other is the valve body. So, we mainly test these two parts when doing the quality tests.

  1. Valve body. First, check the materials, see whether it is brass or not, a low price must need low-cost materials. Then check the size, length, and width of the valve body. A bigger size means more durable function and brings less loss to the equipment.
  2. Valve Coil. First, also check the materials, normally a good coil is made of copper inside, and wrapped in good plastic materials. Then find a 24V or any related power supply and connect it to the coil. If you can hear a sound, it shows the spool of the solenoid valve can work normally.
  3. Air leakage. Although some supplier tests every piece carefully before the shipment, there are lots of suppliers only do a spot check in order to save the cost and time. If there is an air source, connect the valve directly, and you can see whether it’s leaking or not. If there is no such air source, there is an easy way you can do: block the outlet side and blow it with your mouth, also you can see where is the leakage going out. In addition, the coil inspection meter can check the quality of the solenoid valve too.

Step1: Power up the solenoid valve, then unplug the plug and use the multimeter to measure whether there is electricity or not.

Step2: Power up the solenoid valve, then use a thin steel wire to get close to the coil to see whether there is any suction.

Step3: Power on solenoid valve-power off-power on-power off, test repeatedly. Then use a thin hexagonal wrench to poke the brass “pit” on the axis of the solenoid valve to see if it can be sucked in and out.

When we want to test the whole fluid solenoid valve, First pass the controlled medium(liquid or pressure air) to it, set the middle value of the pressure range of the solenoid valve as the pressure value. Then let the solenoid valve coil power on, if the controlled medium has a change in the state from on to off or from break to on, then the solenoid valve is good, otherwise there will be a problem.

Then how to solve the problem if it happens?

I am listing 3 problems and their corresponding solution here:

Problem1: The coil is short-circuited or broken.

Find a small screwdriver and place it near the metal rod in the solenoid valve coil, then power up the solenoid valve. If you feel magnetic, the solenoid valve coil is good, otherwise, it is bad. Solution: we need to replace the valve coil.

Problem2: There is something wrong with the plug/socket.

If the solenoid valve is the one with a plug/socket, there may be some problems with the metal Reed of the socket or problems with wiring on the plug (such as connecting the power cord to the ground wire), and other reasons such as unable to send the power to the coil.
Solution: Fix wiring errors, repair or replace plugs and sockets

Problem3: The spool of the coil doesn’t react.

Solution: Repair or replace the spool, or it’s better to replace the entire solenoid valve.

The above problems are basic ones, if you have any other problems, also pls leave comments under the article, we would like to discuss more with you.

Share 2 more pics of our Solenoid valve that are in production.




Hi, I’m Zoe, I like sharing knowledge of related pneumatic and automatic products, also, some useful skills. Hope we can learn from each other.
Share on linkedin
Share on twitter

Get free samples!

Ask For A Quote

Thanks for your messages, we will contact you again within 1 working day.