The structural length and overall height of the butterfly valve are small, the opening and closing speed is fast, and it has good fluid control characteristics. The structural principle of the butterfly valve is suitable for making large-diameter valves.

When the butterfly valve is required to control the flow, it is important to correctly select the size and type of the butterfly valve so that it can work properly and effectively. Centerline butterfly valve usually requires short structure length and fast opening and closing speed (1/4 turn) in throttling, regulating control and mud medium.

For low-pressure cut-off (small pressure difference), butterfly valves are recommended. Butterfly valves can be used for double-position adjustment, narrowing channel, low noise, cavitation and gasification, a small amount of leakage to the atmosphere, and abrasive media.

When throttling adjustment is required under special working conditions, or strict sealing is required, or butterfly valves are used under severe wear, low temperature (cryogenic) and other working conditions, it is necessary to use a specially designed metal seal with a special three-eccentric or double-eccentric adjustment device. Butterfly valve.

1. It still has stable sealing performance under high temperature and high pressure conditions. Its special sealing system can ensure high sealing performance in various temperature ranges from ultra-low temperature to ultra-high temperature

2. The three-dimensional eccentric sealing system and the optimized design make the opening resistance of the valve small. The sealing surface of the butterfly plate is a conical shape that protrudes upward. When opening, all points on the circumferential surface of the butterfly plate are separated from the sealing ring at the same time, and solid objects are not easy to open. Accumulation on the sealing surface. The valve closing process is completed by the elastic compression of the sealing ring,

3. There is no interlocking phenomenon between the butterfly plate and the sealing ring.

4. The sealing performance of the valve is not affected by temperature changes.

5. The shaft diameter seal of the valve stem adopts graphite pressing and forming sealing ring. In summary, zero leakage is ensured, and the metal seal has zero leakage before, during and after the fire, so it is an intrinsic fire safety type.