Causes and solutions for common failures of steam solenoid valves

Causes and solutions for common failures of steam solenoid valves

1. The solenoid valve terminal is loose or the wire terminal is off, the solenoid valve must not be powered, and the electric actuator wire terminal can be tightened.

2. Leakage. Air leakage will cause insufficient air pressure, making it difficult to open and close the forced valve. The reason is that the sealing gasket is damaged or the slide valve is worn, which causes blow-by in several cavities.

3. The solenoid valve coil is burnt out, you can remove the wiring of the solenoid valve and measure with a multimeter. If it is open, the solenoid valve coil is burnt out.

　　The reason is that the coil is damp, which causes poor insulation and magnetic leakage, which causes excessive current in the gas solenoid valve coil and burns. Therefore, it is necessary to prevent rainwater from entering the solenoid valve. In addition, if the spring is too hard, the reaction force is too large, the number of turns of the coil is too small, and the suction force is not enough to cause the coil to burn. For emergency treatment, you can turn the manual button on the coil from the "0" position to the "1" position during normal operation to open the valve.

Fourth, the solenoid valve is stuck.

　　The matching clearance between the solenoid valve slide valve sleeve and the valve core is very small (less than 0.008mm), and it is generally a single-piece assembly. When mechanical impurities are brought in or there is too little lubricating oil, it is easy to jam. The treatment method can be made by inserting a steel wire through a small hole in the head to make it rebound. The fundamental solution is to remove the high temperature solenoid valve, take out the valve core and valve core sleeve, and clean it with CCI4 to make the valve core move flexibly in the valve sleeve. When disassembling, pay attention to the assembly sequence of the components and the position of the external wiring, so that the reassembly and wiring are correct, and check whether the oil spray hole of the lubricator is blocked and whether the lubricating oil is sufficient.

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