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Solenoid valve common fault
- Sep 13, 2018 -

(1)The solenoid valve terminal or the wire head is loose, when the solenoid valve is not energized and tighten the wire end.


(2)When the solenoid valve coil is burnt out, the wiring of the solenoid valve can be removed and measured with a multimeter. If the circuit is open, the solenoid valve coil is burned out. The reason is that the coil is damp, causing poor insulation and magnetic leakage, causing the electric current in the coil to be too large and burning, so 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 turns of the coil is too little, and the suction force is insufficient to cause the coil to burn. During emergency handling, the manual button on the coil can be turned the position from 0 to 1 , causing the valve to open.


(3)The solenoid valve is stuck. The sliding valve sleeve of the solenoid valve has a small clearance gap in the valve core, and is generally assembled in a single piece. When mechanical impurities enter or the lubricating oil is too little, it is easy to get stuck. The treatment is done by inserting steel wire through a hole in the head to make it bounce back. The fundamental solution is to remove the solenoid valve, take out the valve core and the valve core sleeve, and clean it with CC14, 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 external wiring position, so as to reassemble and wire correctly, and check whether the oil mist injection hole is blocked and the lubricating oil is sufficient.


(4) Air leakage. Leakage can cause insufficient air pressure, making it difficult to open and close the forced valve due to damage to the gasket or wear of the sliding valve to cause several cavity blow-by.




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