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The method of testing the solenoid valve is good or bad: First give the solenoid valve to the controlled medium (liquid, gas < with pressure; air The pressure value is the middle value of the pressure range used by the solenoid valve), and then the solenoid valve coil is energized, if the controlled medium has a change in the state from pass to break or from break to pass, then the solenoid valve is good, otherwise it is problematic.
| Solenoid valve failure and removal First, the solenoid valve does not work after being energized Check whether the power cable is improperly connected. → Reconnect the power cable to the connector Check whether the power supply voltage is in the ± operating range -→ normal position range Whether the coil is unsoldered → Resolder Coil short circuit → Replace coil Whether the working pressure difference is inappropriate → Adjust the pressure difference → or replace the appropriate solenoid valve High fluid temperature → Replace the appropriate solenoid valve Impurities make the main valve core and moving core of the solenoid valve stuck → Clean, if the seal is damaged, replace the seal and install the filter The liquid viscosity is too large, the frequency is too high and the life has reached → replace the product Second, the solenoid valve can not be closed The seal of the main spool or iron core is damaged → Replace the seal Whether the fluid temperature and viscosity are too high → Replace the solenoid valve of the opposite port There are impurities into the solenoid valve spool or moving core → clean Spring life is up or out of shape → replace Choke hole balance hole blockage → timely cleaning The working frequency is too high or the life has reached → change the product or update the product Iii. Other circumstances Internal leakage → Check seals for damage and springs for poor assembly External leakage → Loose joints or broken seals → tighten screws or replace seals Noise when power on → strong parts on the head loose, tighten. Voltage fluctuation is not within the allowable range, adjust the voltage. Iron core suction surface impurities or uneven, timely cleaning or replacement. Field quick judge solenoid valve is good or bad method |
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