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Square stem soft-seated butterfly valve has problems during use

time：

2021-09-15

The butterfly plate of the Square stem soft-seated butterfly valve is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0° and 90°. When the rotation reaches 90°, the valve is fully open. The following will take you to understand its problems during use.

Problems in use:
1. Since the multi-layer Square stem soft-seated butterfly valve ring is fixed on the valve plate, when the valve plate is normally open, the medium forms a positive erosion on the sealing surface, and the soft sealing belt in the metal sheet interlayer is directly affected by the erosion. performance.
2. Restricted by structural conditions, this structure is not suitable for valves with a diameter below DN200, because the overall structure of the valve plate is too thick and the flow resistance is large.
3. Due to the principle of triple eccentric structure, the sealing between the sealing surface of the valve plate and the valve seat depends on the torque of the transmission device to make the valve plate press against the valve seat. In the positive flow state, the higher the medium pressure, the tighter the seal will be squeezed. When the medium in the channel flows backwards, as the medium pressure increases, the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, and the seal begins to leak.
About the problems related to the use of Square stem soft-seated butterfly valve, this is the introduction here. Friends in need can contact our company.