What are the common faults of solenoid valves?

A solenoid valve is composed of the electromagnetic coil and magnetic core and is a valve body containing one or several holes. When the coil is energized or de-energized, the work of the magnetic core will make the fluid pass through the valve body or be cut off to achieve the purpose of changing the fluid direction. Solenoid Valve's electromagnetic components are composed of a fixed iron core, moving iron core, coil, and other components; the valve body part is composed of a sliding valve core, sliding valve sleeve, spring base, and so on. The solenoid coil is directly mounted on the valve body, which is enclosed in a sealed tube, forming a compact and compact combination. The failure of the Solenoid Valve will directly affect the action of the switching valve and the regulating valve. When the coil is energized or de-energized, the work of the magnetic core will make the fluid pass through the valve body or be cut off to achieve the purpose of changing the fluid direction.

Here is the content list:

• The solenoid valve coil burned out

• Solenoid Valve Stuck

• Air Leak of Solenoid Valve

The solenoid valve coil burned out

If the solenoid valve coil is burnt, remove the solenoid valve wiring and measure with a multimeter. If the circuit is open, the Solenoid Valve coil is burned out. The reason is that the coil is damp, which causes poor insulation and magnetic leakage, which causes the current in the coil to be too large and burn. 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 coil turns are too few, and the suction force is not enough, which will also cause the coil to burn out. In emergency treatment, the manual button on the coil can be turned from the "0" position in normal operation to the "1" position to make the valve open.

Solenoid Valve Stuck

When the Solenoid Valve gets stuck. Because the fitting clearance between the spool valve sleeve and the valve core of the Solenoid Valve is very small, it is generally assembled in one piece. When mechanical impurities are brought in or too little lubricating oil is introduced, it is easy to get stuck. Treatment can be by poking a wire through a small hole in the head and allowing it to spring back. The fundamental solution is to remove the solenoid valve, take out the spool and spool sleeve, and clean it with CCI4 so that the spool can be moved flexibly in the valve sleeve. When disassembling, pay attention to the assembly order of each component and the external wiring position, to reassemble and connect correctly, and also check whether the oil spray hole of the lubricator is blocked and whether the lubricating oil is sufficient.

Air Leak of Solenoid Valve

Air leakage from the Solenoid Valve can cause insufficient air pressure, making it difficult to open and close the forced valve due to blow-by in several cavities due to damaged gaskets or worn spool valves. When dealing with the failure of the Solenoid Valve of the switching system, an appropriate time should be selected, and the Solenoid Valve should be dealt with when the power is lost.

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