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Solenoid Valve Non-Action Fault And Troubleshooting Methods

Dec. 11, 2019

The malfunction of the solenoid valve will directly affect the action of the switching valve and the regulating valve. Common malfunctions include that the solenoid valve does not operate. Flush Valve Supplier shares with you. It should be checked from the following aspects:

1. The terminal of the solenoid valve is loose or the wire head is disconnected. The solenoid valve must not be electric and can tighten the wire head.

2. The solenoid valve coil is burned out. You can remove the solenoid valve wiring and measure it with a multimeter. If there is an open circuit, the solenoid valve coil is burnt out.

The cause is damp in the coil, causing poor insulation and magnetic leakage, which causes the current in the coil to be too large and burn out. Therefore, it is necessary to prevent rainwater from entering the solenoid valve. In addition, the spring is too hard, the reaction force is too large, the number of coil turns is too small, and the suction force is not enough to cause the coil to burn out. During emergency processing, the manual button on the coil can be turned from the "0" position to the "1" position during normal operation to make the valve open.

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3. The solenoid valve is stuck. The clearance between the spool and the spool of the solenoid valve is very small (less than 0.008mm), which is generally a single piece assembly. When mechanical impurities are brought in or the lubricant is too little, it is easy to get stuck. The treatment method can be penetrated with a wire through a small hole in the head to make it rebound. The fundamental solution is to remove the solenoid valve, take out the valve core and the valve core sleeve, and clean it with CCI4 so that the valve core can move flexibly in the valve sleeve. When disassembling, pay attention to the assembly sequence of each component and the location of the external wiring, so that the reassembly and wiring are correct. Also, check whether the injection hole of the lubricator is blocked and whether the lubricant is sufficient.

4. Air leakage. Air leakage will cause insufficient air pressure, making it difficult to open and close the forced valve, due to damage to the sealing gasket or the wear of the slide valve, resulting in blow-by of several cavities.

When dealing with the failure of the solenoid valve of the switching system, you should choose an appropriate time to handle the solenoid valve when it is out of power. If the processing is not completed within a switching gap, you can pause the switching system and handle it calmly.

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