Mixing valve should be noted

If the solenoid pilot valve inlet, sludge and other vent is clogged, closed lax plunger is stuck, circuit failure, can lead to valve can not be normal commutation. Concrete mixing plants three cases should be cleaned on the core activities of the pilot valve and the sludge and impurities. The circuit failures are generally divided into the solenoid control circuit faults and fault types. After checking circuit fault, should first manual valve knob a few turns to see the rated pressure valve is working correctly for commutation, if normal commutation, then the circuit is faulty. Inspection, the available instrument measuring the voltage of the solenoid, to see whether the rated voltage, if the voltage is too low, should further examine the power control circuit and the associated limit concrete mix plant. If the valve is not properly rated voltage commutation, you should check the solenoid connector (plug) is loose or exposure is not true. Method is to unplug it, measure coil resistance (should generally be in the hundreds of ohms to several thousand ohms), if the resistance is too large or too small, indicating that the electromagnetic coil is damaged and should be replaced.