For a long time, most domestic industries traded new ones for old, and discarded or sold the replaced valves as waste products. Especially the industry with multi-purpose flanged valves. I want to repair the replaced high pressure, high temperature and large valves, but I don't know how to repair them. Most are still in the manual repair stage. It can be said that in China's valve repair industry, the waste and the available benefits are huge.
In recent years, as various units have gradually started independent economic accounting to reduce costs, from management personnel to front-line maintenance workers have gradually realized the importance of repairing valves, because the money saved in this respect is extremely considerable. However, repairing the valve here does not mean simple repairs, but also includes the use of correct repair methods and excellent grinding repair equipment.
Due to the lack of concept and equipment for valve repair and overhaul, at present, only nuclear power plants in China can basically repair all valves during each shutdown inspection. Broken repair is a maintenance-free repair, which is extremely unfavorable for the safe operation of the entire set of equipment and the service life of the valve. Its potential for emergency shutdown is extremely dangerous, and the resulting losses are also huge. .
If the valve leaks without maintenance, it will often be damaged very much. This not only increases the difficulty of repair, but also often has lost the possibility and value of repair. Therefore, for well-organized and managed valve repair work, not only relevant personnel must have corresponding awareness, but more importantly, preventive and maintenance measures, that is, regular inspection of the valve (for example, the valve's tightness to the outside world, The tightness of the valve in the closed state, etc.). The key to preventive maintenance of the valve is to repair the valve immediately when the valve is found to be leaking for the first time, because the circulating medium can cause the sealing surface in a short period of time even in the case of very small sealing surface damage The large area is damaged, resulting in expensive repair costs.
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