Construction machinery accessories 924G solenoid valve assembly 186-1526 proportional solenoid valve

    Proportional pressure valve analysis and elimination because the proportional pressure valve is just on the basis of the ordinary pressure valve, the regulator handle is replaced by a proportional electromagnet.

     Therefore, the various faults caused by the ordinary pressure valve, which will also produce the ordinary pressure valve fault causes and elimination methods are also fully applicable to the corresponding proportional pressure valve (such as the overflow female corresponding proportional relief valve), can be referred to for processing.

     In addition, there are:

     (1) no current through the proportional electromagnet, so that the voltage regulation failure can be analyzed according to the above   proportional electromagnet failure 'content.
When the voltage regulation failure occurs, you can first check the current value with the meter to determine whether there is a problem with the control circuit of the electromagnet, or a problem with the proportional electromagnet, or a problem with the closing part, which can be dealt with.

     (2) Although the current flowing through the proportional electromagnet is rated, the pressure does not rise at all, or the proportional relief valve shown in Figure 3-45 can not get the required pressure. Between the proportional pilot regulator valve 1(relief valve) and the main relief valve 5, the ordinary pilot overflow electromagnet is still retained;4 a security cabinet; 5 The pilot manual regulating pressure regulating valve 4 of the main relief valve acts as a safety valve here.When the regulating pressure of valve 4 is too low, although the passing current of proportional electromagnet 3 is rated, the pressure does not go up.If the set pressure of valve 4 is too low, the pilot flow from valve 4 back to the tank, so that the pressure does not come up.At this time, the setting pressure of valve 4 should be adjusted higher than the maximum working pressure of Min 1Mpa.