Troubleshooting Solenoid Valves

The failure of the solenoid valve will directly affect the action of the switching valve and the regulating valve. The common failure is that the solenoid valve does not work, which should be checked from the following aspects.

Here is the content list:

• The solenoid valve does not work when energized

• The solenoid valve does not close

• Other conditions that prevent the solenoid valve from working

The solenoid valve does not work when energized

If the solenoid valve is energized, it does not work. This situation is more complicated. First, we need to check whether the power supply wiring is bad. If so, we need to rewire and connect the connector; Secondly, check whether the power supply voltage is within the working range, then we need to adjust it to the normal position range; Then check whether the coil is de-soldered. If it is de-soldered, you need to find professional personnel to help re-solder it; then determine whether the coil is short-circuited. If there is a short-circuit phenomenon, then we need to replace the coil in time; if it is not suitable, it is necessary to adjust the pressure difference or replace the corresponding solenoid valve; If the fluid temperature is too high, we can replace the corresponding solenoid valve; if there are impurities, the main spool and moving iron core of the solenoid valve are stuck, then we need to clean it in time, if the seal is damaged, replace the seal and install the filter; of course, if the viscosity of the liquid is too high, the frequency is too high and the service life has expired, we recommend replacing the product.

The solenoid valve does not close

If the solenoid valve cannot be closed. First, check whether the main valve core of the solenoid valve or the seal of the iron moving core is damaged. If it is damaged, it is recommended to replace the seal; then measure whether the fluid temperature and viscosity are too high. If this happens, it is recommended to replace the corresponding solenoid valve; If impurities enter the solenoid valve core or moving iron core, the solenoid valve will not be able to close, so it is recommended to clean it regularly; it is recommended to replace the spring if the spring has reached its lifespan or is deformed; if the throttle hole of the solenoid valve is balanced if the hole is blocked, we need to clean it in time; if the working frequency is too high or the service life is over, we recommend reducing the load of the solenoid valve or updating the product.

Other situations

Other conditions prevent the solenoid valve from working. If there is internal leakage, we need to check whether the seal is damaged and whether the spring is poorly assembled; if there is external leakage, we need to check whether the connection is loose or the seal is intact. If it is not intact, tighten the screw or replace the seal in time. If there is noise when energized, check whether the top fasteners of the solenoid valve are loose, and if so, tighten them before use; If the voltage fluctuation is not within the allowable range, it is recommended to adjust the voltage; If there are impurities or unevenness on the suction surface of the iron core, clean or replace it in time.

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