How to extend the service life of the regulating valve

Ceramic regulating valves are often used in harsh conditions, installed in heavy process pipes, and the working conditions are extremely complicated. Once problems occur, they are cumbersome and difficult to find, which often makes people feel helpless. The system is complete, the quality is adjusted, the environment is polluted, etc. Therefore, the use of ceramic regulating valves to maximize the maintenance and prolong the service life is the primary problem of using ceramic regulating valves.

1, cleaning pipeline to extend life

Welding slag, rust, solidified slag, iron wire, cloth strips, etc. in the pipeline cause blockage or jamming at the throttle and guide parts, causing the valve core to break, which often occurs in the initial stage of the new commissioning system and after the overhaul. This is the most common failure. In this case, it must be unloaded for cleaning, remove the slag, if the sealing surface is damaged, it should be ground; at the same time, the bottom plug is opened to wash away the slag and rinse the pipeline. Before commissioning, let the regulating valve fully open, let the medium flow for a period of time and then put it into normal operation.

2, increase the opening work to extend the life

When starting to use the ceramic regulator valve, try to work at the maximum opening, such as 80%. In this way, the erosion of the first impurities in the pipeline, the wear and the like occur in a place other than the damaged portion of the valve core, and the impurities in the pipeline are removed, and then the opening degree of the regulating valve is adjusted to a position where the normal opening degree is slightly larger. With the damage of the fluid to the valve core, the flow rate increases, and the opening degree is reduced accordingly, so that the industrial electrical network-cnelc is continuously destroyed, and the entire valve core is fully utilized until the root of the valve core and the sealing surface are destroyed. Can't use it.

3, increase the diameter to improve life

We calculate the correct CV by CV value calculation formula to choose the appropriate valve diameter. At the same flow rate, the smaller the valve diameter, the faster the flow rate of the fluid, and the greater the erosion of the valve to the valve plug and seal. It is recommended that the user appropriately increase the diameter of the valve within the range of freely adjustable opening, thereby reducing wear.

4, transfer damage location to improve life

Transfer the severely damaged area to a secondary location to protect the sealing and throttling surfaces of the valve seat. Usually the ceramic ball valve is the most severely eroded. The fastest fluid velocity is the lower part of the fluid inlet. For the three-piece structure of the ceramic ball valve, the ball can be used for reversal. In this case, a core can be used at the inlet. This will extend the life of the valve by a factor of four.

5, change the valve structure to improve life

The ceramic regulating valve was originally constructed in a two-piece structure. In order to make the structure of the valve more reasonable, it has been changed to the three-piece structure which is now commonly used. This structure has a double seal because of its double seat. At the same time, when choosing a ceramic ball valve, pay attention to selecting a valve with a bevel transition design, such a regulating valve can reduce the impact of the fluid.

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