One-way common faults and maintenance methods of the pneumatic valve (2)

one-way pneumatic valve. Pneumatic valve failure: pneumatic valve can not change or change slowly, gas leak, electromagnetic pilot pneumatic valve is faulty, etc.
( ） One-way pneumatic valve. Pneumatic valve can not change or change slowly, usually due to poor lubrication, spring, stuck or damage to the oil pollution or impurity sticking sliding for some other reason. In this respect, should first check the oil fog machine work is normal, the oil viscosity is appropriate. If necessary, replace the oil, cleaning the sliding part of the pneumatic valve, or replace spring and pneumatic valves.
( ） One-way pneumatic valve. After long time use pneumatic valve pneumatic valve seal, easy to wear and tear of pneumatic valve stem and pneumatic seat damage, the gas leakage of pneumatic valve, pneumatic valve slow or other fault can't work normally. At this point, should replace the sealing ring, pneumatic valve stem and pneumatic seat, pneumatic valve or replacement.
( ） Such as electromagnetic pilot pneumatic valve inlet and outlet intercepted sludge and other sundry, stuck tightly closed core activities, circuit fault and so on, can cause a four-way reversing pneumatic valve is not normal. Before the pilot case of pneumatic valve and activity, should clean the dirt and impurities of the core. The circuit fault generally divided into electromagnetic pneumatic valve control circuit fault and the fault type. In the check circuit failure, should be manual pneumatic valve knob laps, see if the rated pressure pneumatic valve under normal commutation, if normal commutation, this is a circuit fault. Inspection, the electromagnetic coil voltage meter can be measured, to see if it has reached the rated voltage, if the voltage is too low, should be further examination of the power control circuit and the limit switch circuit. If the rated voltage of pneumatic valve does not work, you should check the electromagnetic connector ( Plug) Whether loose or contact is not correct. Method is pulled out, measuring the resistance of the coil, if the resistance is too large or too small, show that the electromagnetic coil is damaged, should be replaced.
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