One-way common faults and maintenance methods of the pneumatic valve < / div >

common faults are: pneumatic valve cannot reversing or reversing slow, gas leak, electromagnetic pilot pneumatic valve is faulty, etc. ( 1) One-way pneumatic valve. Reversing pneumatic valve cannot reversing or reversing slow, usually because of bad lubrication, spring stuck or damage, oil or impurity sticking sliding part and other causes. To this, should first check of oil mist is normal; The viscosity of the lubricating oil. When necessary, the lubricating oil should be changed, sliding part of the reversing pneumatic valve, cleaning or replacement of spring and the reversing pneumatic valve. ( 2) One-way pneumatic valve. Reversing pneumatic valve is seen after long time using the pneumatic sealing ring wear, pneumatic valve stem and valve core pneumatic seat damage phenomenon, results in a gas leak in the pneumatic valve, pneumatic valve slow or can't normal commutation failure, etc. At this point, you should replace the sealing ring, pneumatic valve rod, and pneumatic seat, or will the reversing pneumatic valve. ( 3) If electromagnetic pilot pneumatic valve inlet and vent was sludge and other debris jam, closed lax, activity core was jammed, a fault circuit, etc. , all can lead to the reversing pneumatic valve can't normal commutation. The former three kinds of activities should be cleaning the forerunner of pneumatic valve and core on the sludge and impurities. And circuit fault generally divided into two groups: the control circuit fault and electromagnetic coil. Before checking circuit fault, should be the reversing of the pneumatic valve manual knob turning a few times, see the reversing pneumatic valve under the rated pressure whether can normal commutation, if can normal commutation, circuit is defective. Check, instrument measuring electromagnetic coil voltage are available, and see if the rated voltage, if the voltage is too low, should further check the control circuit of the power supply circuit and associated travel switch. If the reversing pneumatic valve under rated voltage can't normal commutation, should check the joint of electromagnetic coil ( Plug) Whether loose or exposure to false. Method is to remove the plug, measuring coil resistance, if the value is too big or too small, and explain the electromagnetic coil is damaged, should be replaced.