What are the signs of initial damage of solenoid valve

The solenoid valve is broken will directly affect the action of the switching valve and the regulating valve, the common problems are the solenoid valve does not act, the solenoid valve is broken what is reflected.

(1) The solenoid valve connector loosens or the wire falls off, the solenoid valve shall not be electric, and the wire can be fastened.

(2) The solenoid coil is burnt out, the solenoid valve can be removed, measured with a multimeter, if open, the solenoid coil is burnt out. The reason is that the coil is damp, causing bad insulation and magnetic leakage, the formation of excessive current in the coil and incineration, so we should avoid rain into the solenoid valve. In addition, the spring is too strong, the reaction force is too large, the coil turns too few, suction is not enough can also make the coil burn. In case of emergency, the manual button on the coil can be hit from "0" to" 1" to make the valve open.

(3) The solenoid valve is stuck. Solenoid valve slide valve sleeve and spool cooperation gap is very small (less than 0.008mm), a - generally is a single installation, when there are mechanical impurities or too little oil, it is very simple stuck. The treatment method can be steel wire from the head hole inserted, so that it springs back. The bottom solution is to remove the solenoid valve, take out the spool and spool sleeve, clean with CCI4, so that the spool is flexible in the valve sleeve. When disassembling, attention should be paid to the installation sequence and external connection orientation of each component, so as to reinstall and connect correctly. It is also necessary to check whether the spray hole of the oil mist is blocked and whether the lubricating oil is satisfied.

(4) Air leakage. Air leakage will form a lack of air pressure, which makes it difficult to open and close the forced valve. The reason is that the sealing gasket is damaged or the spool valve is worn and a cavity channeling is formed. When dealing with the solenoid valve fault of the switching system, the appropriate time should be selected, such as the solenoid valve in the loss of power to deal with, if not completed in a switching gap, the switching system can be suspended, calm treatment.