Pneumatic valve common fault and screening methods

Pneumatic valve type pneumatic valve actuator _ _ pneumatic valves: (common fault and screening method 1) Terminal loose or fall off thrum pneumatic valve, pneumatic valve shall not gas, can tighten thread ends. ( 2) Pneumatic valve coil burn out, can remove the pneumatic valve connection, measured with a multimeter, if open circuit, the pneumatic valve coil burn out. Coil be affected with damp be affected with damp, reasons caused bad insulation and magnetic flux leakage, causing excessive airflow in coil and burned down, so to prevent rain water from entering the pneumatic valve. In addition, the spring quality, reaction force is too large, the coil number of turns is too little, not enough suction also coil may be destroyed. When emergency treatment, but the manual button on the coil by the normal work of '0 & quot; To '1 & quot; And makes the valve to open. ( 3) Pneumatic valve is stuck. Pneumatic valve valve and valve core set of fit clearance is small ( Less than zero. 008毫米) , are generally single assembly, when mechanical impurities into or lubricating oil is too little, it is easy to get stuck. Treatment methods available wire holes stab, from the head to make it back. The fundamental solution is to pneumatic valve will be removed, remove the valve core and valve core, clean with CCI4, makes the valve core within the valve sleeve flexible motion. Removal should be paid attention to when all parts, assembly sequence and wiring position to reassemble and wiring is correct, also check oil mist detector injection hole blockage, lubricating oil is enough. ( 4) Air leakage. Leakage will cause the air pressure is insufficient, make it easier for mandatory valve opening and closing, the reason is that sealing gasket damage or slide valve wear several cavity caused by gas. In dealing with the pneumatic valve switch system failure, should choose the appropriate time, such as the pneumatic valves are in a loss of air pressure, if processing is not down in a switch gap, switched systems can be suspended, calmly deal with.