Valve leakage reasons and methods of treatment

November 07 10:05:52, 2021

Valve Flap and Seat Sections In the sealed area, leakage beyond the rated range can result in the loss of media, which in turn can damage the sealant. - Under normal circumstances, the sealing surface of the safety valve is mainly composed of metal material, and to do as smooth and smooth as possible, but in the case of secondary extrusion with pressure medium, it is impossible to completely seal leaks is not likely of. Therefore, under the rated pressure environment, the safety valve with steam as the medium can be detected solely by the naked eye and ears. The leakage of the valve for the following two main reasons: (1) sealing surface dirt and debris, etc., and the original seal of the block plugged, so that there is a gap between the valve core and valve seat, resulting in the infiltration of the valve Leakage phenomenon. Solve this type of problem, usually? [Ragged dirt on the cover. Temporarily disable the boiler ready for maintenance, we must first run the safety gate test run, once the leak will have to overhaul. The run-up interval is 20 minutes after it is completely cooled. (2) seal surface damage. There are many reasons, such as: First, the sealing material failed. Safety valve on the one hand after many years, easily due to constant switching on and repair and other reasons caused by the strength of the sealing surface is weakened, resulting in reduced ability to seal. The recommended solution to this problem is to flatten the original sealing surface and perform secondary work-in-place welding based on the original drawing to increase the surface hardness and strength. And pay attention to the surface damage, must not be sloppy. Second, overhaul quality. Due to the poor level of maintenance, resulting in the valve core and seat in the grinding process can not achieve a certain level. The solution is to use grinding or even turning to repair the sealing surface as much as possible depending on the severity of the damage. Third, improper assembly or parts size is wrong. In the entire assembly work, the valve core and the valve seat is not fully aligned, or there in the junction of the surface of a serious problem of light transmission, there may be valve seat and seat seal is too loose, it is difficult to truly seal. The solution is to strictly check the new moon 九 nine squid squid sacks ざ a ざ Tan 窒 dead head implants 乙 乙 乙? B V じ じ Tartary branded 湎 芙 wild shortage 芙? 穑 穑? ? P

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