NEWS CENTER


How to carry out routine maintenance of pneumatic control valve


Release time:

2021-07-20

Pneumatic control valveThe daily maintenance of the pneumatic black water control valve When the control valve uses graphite asbestos as the filler, a lubricating oil should be added to the filler for about three months to ensure that the control valve is sensitive and easy to use. If it is found that the pressure cap of the packing is very low, the packing should be made up. If it is found that the PTFE dry packing is hardened, it should be replaced in time. Pay attention to the operation of the regulating valve during the tour to check whether the output of the valve position indicator and the regulator is in conformity.

How to carry out routine maintenance of pneumatic control valve

Pneumatic control valveThe daily maintenance of the pneumatic black water control valve When the control valve uses graphite asbestos as the filler, a lubricating oil should be added to the filler for about three months to ensure that the control valve is sensitive and easy to use. If it is found that the pressure cap of the packing is very low, the packing should be made up. If it is found that the PTFE dry packing is hardened, it should be replaced in time. Pay attention to the operation of the regulating valve during the tour to check whether the output of the valve position indicator and the regulator is in conformity.
Regulating valves with positioners should always check the gas source and deal with problems in time. Regulating valves should always be kept hygienic and all parts intact and easy to use. Common faults and causes of a regulating valve does not operate. The phenomenon and reasons are as follows: no signal, no gas source. The air source is not on, because the water in the air source freezes in winter.
Pneumatic control valve is to use compressed air as the power source, the cylinder as the actuator, and with the help of electric valve positioner, converter, solenoid valve, holding valve and other accessories to drive the valve, realize the switch or proportional adjustment, and receive the control signal of industrial automation control system to complete the adjustment of pipeline medium: flow, pressure, temperature and other process parameters. Pneumatic control valve is characterized by simple control, fast response, no need to take additional explosion-proof measures.
Cause the air pipe is blocked or the filter and pressure reducing valve are blocked and malfunction, and the compressor is faulty; the main air supply pipe leaks. Gas source, no signal. Regulator fault, signal tube leakage; locator bellows leakage; regulating screen diaphragm damage. The positioner has no air supply. Filter blockage; pressure reducing valve problem I, pipeline leakage or blockage. The positioner has air supply and no output.
The positioner saves hole clogging. Signal, no action. The valve core falls off, and the valve core is stuck with the society or the valve seat; the valve stem is tortuous or broken; the valve core of the valve seat is frozen or contaminated; the actuator spring is rusted due to long-term use.