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Electromagnetic valve more common fault analysis analysis

General electromagnetic valve related problems analysis: What are the common problems encountered with common solenoid valves? Or some complicated problems besides asking the technicians and the repairman of a professional manufacturer, how do you solve these problems when you use the solenoid valve? Take a look at the specific analysis of this article, can give you some inspiration?
<1, No operation after solenoid valve is energized>
Analysis and resolution: The brackets contain the answers to the solutions.
Check the power supply wiring is not bad; (reconnect wiring and connector connection);
Check whether the power supply voltage is within ± working range; (adjust the normal position range);
Whether the coil is off-welded; (rewelding);
Coil short circuit; (replace coil)
The operating pressure difference is not suitable; (adjust the pressure difference or replace the solenoid valve);
Fluid temperature is too high; (replacing the solenoid valve);
Impurities have caused the main spool and the moving iron core of the solenoid valve to get stuck; (For cleaning, seals should be replaced and filters should be installed if there is any seal damage);
Liquid viscosity is too high, frequency is too high and life is reached (replacement of product)
<2, solenoid valve cannot be closed>
The main spool or iron core seal is damaged; (replacement seal)
Fluid temperature, viscosity is too high; (replacement of the solenoid valve)
Impurities enter the solenoid valve core or moving iron core; (cleaning)
The spring has reached or deformed; (replacement)
Throttle hole balance hole plug; (timely cleaning)
The operating frequency is too high or the life has come; reselect the product or update the product
<3. Other cases regarding solenoid valve problem>
Leakage in the solenoid valve; (Check if the seal is damaged, the spring is not assembled properly)
Leakage of solenoid valve; (loose connection or broken seal; tighten screw or replace seal)
The solenoid valve is noisy when energized; (The solid on the head is loosened and tightened. The voltage fluctuation is not within the permissible range. Adjust the voltage. The core suction surface is not clean or replaced.)

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