Double Eccentric Butterfly Valve is also called high-performance butterfly valve. It is mainly used for drainage of water plants, power plants, steel smelting, chemical engineering, water source engineering, environmental facility construction, etc. It is especially suitable for water pipelines and used as regulation and interception equipment. . Compared with the centerline butterfly valve, it is more resistant to high pressure, has a longer life and good stability.
1. Working principle
The Double Eccentric Butterfly Valve is further improved on the basis of the single eccentric butterfly valve. Its structural feature is that the axis of the valve stem deviates from the center of the butterfly plate and the center of the body. The double eccentric effect enables the butterfly plate to be released from the valve seat immediately after the valve is opened, which greatly eliminates unnecessary excessive extrusion and scratching of the butterfly plate and the valve seat, reduces the opening resistance, reduces wear and improves The life of the valve seat is improved. The large reduction in scratching also allows the Double Eccentric Butterfly Valve to use metal seat, which improves the application of the butterfly valve in the high temperature field.
2. Structural features
1 Reasonable design, compact structure, easy assembly and disassembly, and easy maintenance.
2 The eccentric structure is adopted to reduce the friction of the sealing ring and prolong the service life of the valve.
3 Completely sealed, zero leakage. Can be used in vacuum conditions.
4 Replace the material of the valve plate sealing ring, butterfly plate, rotating shaft, etc., which can be applied to a variety of media and different temperatures.