1) cleaning method welding slag, rust, slag and so on in the pipeline will be blocked or stuck in the throttle, guiding position and the balance hole of the lower valve cover, which will cause the valve core curved surface, the guiding surface to be pulled and scratched, and the sealing surface to produce indentation and so on.. This often happens when the new system is put into operation and the initial stage after overhaul. This is the most common fault. In this case, it must be removed for cleaning, and the slag should be removed. If the sealing surface is damaged, it should also be grinded; at the same time, the underplug should be opened to wash away the slag falling from the balance hole into the lower valve cover, and wash the pipeline. Before being put into operation, let the regulating valve be fully open and the medium flow for a period of time before being brought into normal operation. 2) external scour method when using common valve to adjust some medium which is easy t...
Mar 03, 2023