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русскийThe manufacturing process of copper valve manufacturers is complex and technically difficult. What process characteristics should we pay attention to?
1. Process arrangement of valve parts
The number of main parts of the valve is small, the structure is relatively simple, the machining accuracy of most sizes is not high, and the exterior is relatively rough, which gives people the impression of a simple machine. In fact, the heart sealing part of the valve is extremely precise, and the "three degrees" (flatness, smoothness, hardness) of the sealing surface are very high, and the matching degree of the sealing pair composed of the two sealing surfaces must reach zero to zero. In order to meet the zero leakage of the air tightness test. This kind of rough benchmark to ensure the precise zero-to-zero requirement of the heart is the technological difficulty of valve processing.
2. Valve inspection
The valve is an important opening and closing and regulating element of the pressure pipeline, and the working conditions of the pressure pipeline are very different, such as high temperature and high pressure, low temperature and deep cooling, flammable and explosive, highly toxic and strong corrosion. However, the test and inspection conditions for valve manufacturing cannot meet the same requirements of the working conditions. The international and domestic valve test standards stipulate that the test is carried out with gas or water as the medium under conditions close to normal temperature.
There is a fundamental hidden danger, that is, the valve products that pass the normal factory test may be difficult to meet the use requirements due to material selection, casting quality and seal damage under harsh actual working conditions, and there will also be major accidents. quality accident.
