NEWS CENTER

Industry News

Company News

Announcements

What problems will the Square stem soft-seated butterfly valve encounter in use

time：

2021-09-15

What problems will the Square stem soft-seated butterfly valve encounter in use

Square stem soft-seated butterfly valve, as a component used to realize pipeline system cut-off and flow control, has been widely used in many fields such as petroleum, chemical industry, metallurgy, and hydropower. The following will take you to understand what problems the Square stem soft-seated butterfly valve will encounter in use.

Square stem soft-seated butterfly valve
Problems in use:
1. Since the multi-layer soft and hard stacked sealing ring is fixed on the valve plate, when the valve plate is normally open, the medium will form a positive erosion on the sealing surface, and the soft sealing belt in the metal sheet interlayer will directly affect the sealing performance after being washed.
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 the triple eccentric structure, the seal 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. The Square stem soft-seated butterfly valve manufacturer tells you that 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.
The relevant content about the problems encountered in the use of Square stem soft-seated butterfly valve is introduced here. If necessary, you can contact our company to purchase.