1.the solenoid valve does not work after being energized

Check for poor power wiring. Rewiring and connector connections

Check if the power supply voltage is within ± working range - adjust the normal position range

Whether the coil is desoldered, rewelded

Short circuit of coil

Is the working pressure difference inappropriate? Adjust the differential pressure or replace the proportional solenoid valve

Fluid temperature is too high Replace the proportional solenoid valve

There are impurities to make the main valve core and moving iron core of the solenoid valve be stuck for cleaning. If there is damage to the seal, 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. Replace the product.

2.the solenoid valve can not be closed

The seal of the main spool or the iron core has been damaged. Replace the seal.

Is the fluid temperature and viscosity too high? Replace the solenoid valve of the opposite port.

Impurities enter the solenoid valve to produce the valve core or moving iron core for cleaning

Spring life has been reached or deformed

The orifice balance hole is blocked and cleaned in time.

The operating frequency is too high or the life is up. Re-elect or update the product.

3.other circumstances

Internal leak Check the seal for damage and the spring is not properly assembled

External leakage The connection is loose or the seal is broken. Tightening the screw or replacing the seal

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.

Decade