Good Quality Solenoid Valve 121-1491 Control Valve VE Pump Parts for Caterpillar Excavator CAT320B 320C

Solenoid valves in the off state, the coil will not be energised, there will be no power consumption, so the coil will not heat up. And by the medium pressure and spring force and other factors, or because of the core suction force is not enough to cause the dynamic and static iron core suction, in the coil presents the energised state, the coil will produce a certain amount of suction, and the dynamic iron core will receive electromagnetic suction and permanent magnet suction effect of the impact of overcoming the spring force and the medium pressure and with the static iron core suction, which will result in the opening of the valve, and the valve body valve port. Open the valve body valve mouth, under the state of cutting off the coil power supply, solenoid valve, static iron core showing suction state, and the solenoid valve to maintain a more stable open valve. In the solenoid valve to close, the coil will produce reverse current, the magnetic field generated and the magnetic field generated by the moving iron core in the opposite direction, under the role of homosexual repulsion will effectively weaken the moving iron core on the static iron core of the attraction, resulting in the separation of the moving and static iron cores, so that the valve will be closed valve body valve mouth.

In order to protect the stable operation of the solenoid valve, to effectively avoid the emergence of coil heating and other problems, in the work of the solenoid valve should pay attention to the maintenance of management, in practice, to do the following points:

First, for the pilot solenoid valve, according to the specification requirements to check the differential pressure in the pipeline, if the differential pressure is too small will cause the solenoid valve can not work properly. If the differential pressure is too small, we should choose direct-acting solenoid valves. If the differential pressure is too large, it will lead to higher than the design value of the solenoid valve, can not guarantee its normal operation, at this time to apply high-pressure solenoid valve.

Secondly, most of the conditions under the solenoid valve are horizontally mounted, if the side of the installation will cause the valve to close tightly and cause internal leakage and other problems. In this regard, avoid side mounting as much as possible.

Third, if the solenoid valve for a long time, it will lead to the piston and the valve seat between the sealing is not enough, in such a state should be re-grinding piston sealing surface, and then the valve seat grinding.

Fourth, in the work of the project, to check the valve before and after the pressure gauge, to ensure that the working pressure is not higher than the rated pressure value, the working differential pressure should be controlled in a reasonable range of rated differential pressure, in the work of the pressure is higher than the fixed pressure or higher than the rated differential pressure, we must stop the application of solenoid valves, and in time, before and after the manual valves, to avoid solenoid valve explosion and leakage and other issues.

Fifth, after the installation of solenoid valves, to carry out media test action several times, after determining its normal before they can be put into application.

Sixth, to be low angstroms cleaning, timely processing in the valve inside and outside as well as in the armature suction surface in the residual dirt, to avoid damage to the sealing surface.

Seventh, the solenoid valve in the stop operation to close the valve before the manual valve, for a long time without the solenoid valve and then re-activate the time, it is necessary to check according to the norms, in the normal switch in the reasonable application.