First, we can divide the valve stem sealing surface into two parts, namely the cylindrical sealing surface and the inverted sealing surface. When these two sealing surfaces come into contact with the pipeline medium, corrosion will occur, and the inverted sealing surface will be filled with the valve cover. The cones at the lower part of the cone are in contact with each other, which can effectively prevent the material from leaking, but the effect is not very ambitious.
Therefore, in the process of protecting the sealing surface of the valve stem, we must first deal with its appearance, such as chromium plating, nitriding, quenching, etc. This is mainly because after the surface of the sealing surface is ground, its many functions will be corresponding Disappearance, such as its anti-corrosion and mechanical function, so we can deal with its appearance to a degree so that these functions can be recovered.
Secondly, in the selection of the shape of the grinding object, we can choose flat or circular. When grinding, we need to first press the object on the surface of its sealing surface, and then move it slowly in four directions, but its grinding accuracy It is not very high, or we can put it on the sealing surface of the valve stem, and then change it with plaster, etc. The grinding process is relatively complicated. Regarding the wear of the sealing surface is not very serious, we can wrap the valve stem with gauze, and the purpose of grinding it can be accomplished by moving the gauze.
