Butterfly valve is a kind of component used to realize pipeline opening and flow control. As the industrial environment requires more and more butterfly valves, the Triple Eccentric Butterfly Valve, which is formed by the third eccentricity, is widely used because of its good zero leakage, high temperature and high pressure resistance. In order to use the Triple Eccentric Butterfly Valve, besides understanding the basic advantages of the Triple Eccentric Butterfly Valve, we should also understand the problems existing in the use of the Triple Eccentric Butterfly Valve.

First, because the multi-layer soft and hard overlapping seal ring is fixed on the valve plate, when the valve plate is normally open, the medium forms a positive erosion on its sealing surface, and the soft sealing belt in the metal interlayer is eroded, which directly affects the sealing performance.

2. Restricted by structural conditions, this structure is not suitable for making valves with diameters below DN200. The reason is that the overall structure of the valve plate is too thick and the flow resistance is large.
3. Because of the principle of tri-eccentric structure, the seal between the sealing surface of the valve plate and the seat is to press the valve plate to the seat by the moment of the transmission device. In the positive flow state, the higher the medium pressure, the tighter the sealing extrusion. When the flow channel medium countercurrent, with the increase of the medium pressure, the unit positive pressure between the valve plate and the seat is less than the medium pressure, the seal begins to leak.
Above is the problem of Triple Eccentric Butterfly Valve in use, users should pay special attention to the use of Triple Eccentric Butterfly Valve.