Troubleshooting method for regulating valve operation
Valve suddenly stopped during operation, the following methods: during using the valve, please do not arbitrarily adjust action, because you are probably caused by the adjustment of the flow control valve is not stable, in order to ensure that the use of the process can run normally.
First, the body wall
The valve body is often subject to the impact of the media and corrosion, it is necessary to focus on the pressure, corrosion resistance.
Two, the valve seat
The control valve is in the operation, due to the infiltration of the medium, the valve seat is fixed inside and outside the table is easy to corrosion and seat loose, should pay attention to the view. The operation of the valve under high pressure, but also to check the sealing surface of the valve seat is not bad.
Three, the valve spool
The movable parts of regulating valve is during operation, the media, erosion, corrosion is most serious, we should be carefully check all parts of the spool is corrosion, wear, especially in the case of high-pressure differential valve wear is more severe (due to cavitation should pay attention to the scene). Spool damage should be replaced. It should also pay attention to whether the valve stem is also similar to the scene, or loose with the spool and so on.
Four, the O-ring seal and the other is not aging and cracking.
Five, we should pay attention to PTFE packing, sealing grease is not aging, with the surface is not damaged, should be replaced when necessary.
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