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Extend the life of the control valve
Ceramic valves are often used in harsh conditions, installed in the heavy process pipe, the working conditions are extremely complex, if there is a problem, because of its bulky, difficult to find the problem, often helpless, but also involves the system put into operation, System integrity, quality control, environmental pollution and other issues, the rational use of ceramic control valve, to maximize its maintenance, to extend its service life, the use of ceramic valve is the primary problem. The following provides five kinds of ceramic control valve to extend the life of the method. 1, cleaning the pipe to extend the life Pipe in the welding slag, rust, lime slurry solidified slag, wire, cloth and other restrictions in the throttle, leading to the blockage or stuck to the spool fragmentation, often occurs in the new cast System and overhaul after the initial investment. This is the most common failure. In this case, you must uninstall for cleaning, remove debris, such as the sealing surface is also damaged should be ground at the same time the bottom plug to open to wash away the debris, and the pipeline to be washed. Put into operation, let the control valve fully open, let the medium flow for a period of time and then into normal operation. 2, increase the opening work to extend life in the beginning of the use of ceramic valve to maximize the opening on the work, such as 80%. In this way, the initial impurities in the pipeline erosion, wear and other damage occurred in the spool outside the damaged part of the clearance of impurities in the pipeline, and then adjust the opening of the valve to the normal opening slightly larger , With the fluid damage to the spool, the flow increases, the corresponding decrease in opening, so constantly damaged, and gradually closed, so that the entire spool full use until the valve core and sealing surface damage, can not be used so far. 3, Increasing the caliber to improve life expectancy We through the CV value calculation formula, calculate the correct CV to select the appropriate valve diameter. In the case of the same flow, the smaller the diameter of the valve, the faster the fluid flow rate, the more aggressive the media will be to the spool and seal. Users are advised to be able to freely adjust the opening range, the appropriate increase in the diameter of the valve, which played a role in reducing wear. 4, transfer damage position to improve life expectancy to the place of serious damage to the secondary location to protect the valve seat sealing surface and throttle face. Ceramic ball valve erosion is usually the most serious, the fastest fluid place is the fluid inlet of the lower part of the ceramic ball valve for the current three-piece structure, you can use the ball to the core, so a core can be used at the entrance of the four Times, the valve life to extend 4 times. 5, change the valve structure to improve life Ceramic valve initially used two-piece structure, in order to more rational structure of the valve into the now commonly used three-piece structure, this structure as a double seat, it also has a double sealed characteristic. At the same time, the choice of ceramic ball valve attention to choose a ramp transition design of the valve, this valve can reduce the impact of the fluid.