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Electric valve common problem diagnosis and maintenance Germany imported electric valve

The electric valve does not work after being energized
Check if the power wiring is defective → rewire and connector connection
Check if the power supply voltage is within the ± working range - → adjust the normal position range
Whether the coil is desoldered → re-welded
Short circuit of coil → change coil
Is the working pressure difference inappropriate → adjust the differential pressure → or replace the proportional electric valve
Fluid temperature is too high → replace the proportional electric valve
There are impurities that cause the main valve core and moving iron core of the electric valve to be stuck → cleaning. If there is seal damage, replace the seal and install the filter.
The viscosity of the liquid is too high, the frequency is too high and the life is up to → replace the product

Electric valve cannot be closed
The seal of the main spool or the iron core has been damaged → replace the seal
Whether the fluid temperature and viscosity are too high → replace the electric valve of the opposite port
There are impurities entering the electric valve to produce the valve core or moving iron core → cleaning
Spring life has reached or deformed → replaced
The orifice balance hole is blocked → timely cleaning
The operating frequency is too high or the life is up to → re-elect or update the product

Electric valve other situations
Internal leak → check if the seal is damaged and the spring is not properly assembled
External leakage → loose connection or seal is broken → tighten the screw or replace the seal
There is noise when energized → the solid parts on the head are loose and tightened. The voltage fluctuation is not within the allowable range and the voltage is adjusted. The iron core suction surface is dirty or uneven, and it is cleaned or replaced in time.

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