Introduce the problems in the process of using fluorine-lined butterfly valve

Introduce the long-term problems in the process of using fluorine-lined butterfly valves. There are many problems when using fluorine-lined butterfly valves. The following will introduce you to the existing problems. 1. High-performance fluorine-lined butterfly valve, characterized in that: the valve seat sealing ring is composed of multi-layer stainless steel sheets on both sides of the soft T-shaped sealing ring. 2. Due to the principle of the rubber-lined butterfly valve, the sealing between the sealing surface of the valve plate and the valve seat relies on the torque of the transmission device to press the valve plate to the valve seat. In the positive flow state, the higher the medium pressure of the pinch valve, the fluorine-lined valve, and the exhaust valve, the tighter the seal squeezes. When the medium in the flow channel flows back, the seal begins to leak when the unit positive pressure between the valve plate and the valve seat is less than the medium pressure as the medium pressure increases. 3. Restricted by structural conditions, the 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. 4. Since the multi-layer soft and hard laminated sealing ring is fixed on the valve plate, when the valve plate is normally open, the medium forms a positive scour on its sealing surface, and the soft sealing belt in the metal sheet interlayer is eroded, which directly affects the sealing performance. When the fluorine-lined butterfly valve is in a reverse flow state, the seal between the valve plate and the valve seat is driven by the torque of the driving device to press the valve plate against the valve seat. With the increase of the reverse medium pressure, when the unit positive pressure between the valve plate and the valve seat of the fluorine-lined butterfly valve is less than the medium pressure, the deformation stored by the springs of the colloid mill, emulsifier, filter and adjusting ring after being loaded It can compensate the tight pressure between the valve plate and the sealing surface of the valve seat and play an automatic compensation role.
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