Pneumatic actuators repair methods

the pneumatic actuator is a kind of relying on the execution of air drive valve opening and closing device, its actuators and driving mechanism is integrated, so the structure is simple, small volume, in power plants is widely used for safety requirements such as high places. Whatever equipment, will encounter problems after long time use, pneumatic actuator is no exception. Below to introduce the two pneumatic actuators common faults and the corresponding maintenance method. Pneumatic actuators common faults and maintenance methods: fault, after electrify voltage indicator light is not bright, bar plate has no feedback, no action to signal. Maintenance methods: need to check whether the insurance tube is open, if broken, will check whether put bar plate part of the power supply contact is good, if it is normal to check the power indicator light, using a multimeter to check if the light is open, that is light is fault. Failure in the commissioning process of the two, run after the electric actuator, provide signal, the valve can open but close without action. Maintenance method: first to check the feedback circuit, if the trouble-free, to turn signal indicator lights, normal, give off signals, light is not bright, show off thyristor part of the problem. Check the indicator light, use the multimeter to check off light, open circuit, returned to normal after replacement of SCR.