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Pneumatic valve daily how to maintain?


Release time:

2021-07-16

WhenPneumatic valveWhen graphite asbestos is selected as the filler, lubricating oil should be added to the filler once every three months to ensure that the regulating valve is active and easy to use. If it is found that the pressure of the packing pressure cap is very low, the packing should be compensated. If it is found that the PTFE dry packing is hardened, it should be replaced in time.

Pneumatic valve daily how to maintain?

WhenPneumatic valveWhen graphite asbestos is selected as the filler, lubricating oil should be added to the filler once every three months to ensure that the regulating valve is active and easy to use. If it is found that the pressure of the packing pressure cap is very low, the packing should be compensated. If it is found that the PTFE dry packing is hardened, it should be replaced in time. The operation of the pneumatic valve should be paid attention to during the itinerant inspection, and the output of the valve position indicator and the regulator should be checked.
Pneumatic valves should often check the gas source, found that the problem in a timely manner; should often adhere to the pneumatic valve health and the parts in good condition. Common shortcomings and causes of a regulating valve does not act. Disadvantages 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.
Cause air duct blockage or filter and pressure reducing valve blockage failure, compressor defect; air source main pipe leakage. Gas source, no signal. Defects of regulator, signal pipe leakage; Locator bellows leakage; Diaphragm of regulating net is damaged. The positioner has no air supply. The filter is blocked; the pressure reducing valve has disadvantages I, the pipeline is leaking or blocked. The positioner has air supply and no output.
The positioner saves hole blocking. Signal, no action. The valve core falls, 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 because it is not necessary for a long time.
Pneumatic 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 other explosion-proof measures.