Solenoid valve common faults and solutions detailed

Solenoid valve common faults and solutions detailed

Solenoid valves play a crucial role in industrial pneumatic systems, enabling them to drive the cylinders for reciprocating motion, enabling various automation functions. However, there may be some common failures during the use of solenoid valves, and understanding the causes and solutions of these failures is crucial to maintaining the normal operation of the system.

🔧 The coil is short-circuited or disconnected

Detection method: Use a multimeter to measure the on-off of the coil. If the resistance value is close to zero or infinity, it indicates that the coil has a short circuit or open circuit problem. If the measured resistance is normal (usually tens of ohms), a final test is also required. Place a small screwdriver near the metal rod threaded through the solenoid coil and energize the solenoid. If it feels magnetic, the coil is normal, otherwise it is bad.

Solution: If a problem is detected in the coil, replace the solenoid coil.

🔌 Plug/socket problem

Symptom: When the solenoid valve is equipped with a plug/socket, the metal spring of the socket may be damaged, and the plug connection is incorrect (for example, the power cable is mistakenly connected to the ground cable), resulting in the power cannot be transmitted to the coil. To avoid these problems, it is recommended to tighten the fixing screw after the plug is inserted into the socket and tighten the fixing nut after the coil is installed on the spool rod.

Treatment: Check and correct wiring errors, repair or replace damaged plugs and sockets.

🧠 The valve core is faulty

Fault phenomenon: In the case of normal pressure of the medium through the solenoid valve, press the red manual button of the solenoid valve, and the solenoid valve does not have any reaction (the pressure medium does not change on or off), indicating that the spool must be bad.

Treatment method: First of all, check whether there are problems in the medium, such as whether there is a lot of water in the compressed air (sometimes the oil-water separator does not play a very big role, especially when the pipeline is poorly designed, the compressed air through the solenoid valve will be