Secondly, because of the internal leakage caused by the product quality, we all know this problem very well, even if we don't use small editors. Because this is a quality problem, using other methods does not work at all. However, it is also necessary to introduce to you that in production, if the valve material, processing technology and assembly process are not strictly controlled, it will lead to unqualified grinding of the sealing surface, sand holes and other defects. At the same time, if these defects have not been completely eliminated, it will lead to internal leakage of the electric control valve, so the sealing surface needs to be processed again. 　　　　

The advantages and disadvantages of butterfly valves In terms of current production and use, butterfly valves have been used as on-off and flow control of pipeline systems, and have been widely used in petroleum, chemical industry, hydropower and many other fields. Now a more practical butterfly valve is called tri eccentric metal hard seal butterfly valve. Its valve body and valve seat are an integral component. On the sealing surface of the valve seat, there are hardfacing, temperature resistant and corrosion resistant materials. The difference between electric on-off butterfly valve and traditional butterfly valve lies in its high temperature resistance, no friction when opening and closing, easier operation and longer service life. However, because it is composed of multi-layer soft and hard laminated seal rings, when the valve is in the open state, the medium will form a positive flushing on its sealing surface, which will affect its sealing performance. This is its main disadvantage.