Features and application area of double eccentric butterfly valve

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

industry, 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, the double eccentric butterfly valve is more resistant to high pressure, has a longer life and good stability.
Another name: high performance butterfly valve
Applicable area: water plant, power plant, steel mill smelting, chemical industry
Features: Longer life and good stability

use of double eccentric butterfly valve:
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 industry, 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, the double eccentric butterfly valve is more resistant to high pressure, has a longer life and good stability. Compared with other valves, the larger the caliber, the lighter the material, and the lower the cost. But because there is a butterfly plate in the middle and the flow resistance is large, a butterfly valve smaller than DN200 is meaningless.

working principle of double eccentric butterfly valve:
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 scraping is greatly reduced, and at the same time, the double eccentric butterfly valve can also use a metal seat, which improves the application of the butterfly valve in the high temperature field.

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 ultra-high vacuum conditions
4 Replace the valve plate sealing ring, butterfly plate, shaft and other materials, which can be applied to a variety of media and different temperatures

Related news /products:
Installation instructions of double eccentric butterfly valve;
The sealing characteristics and principle of eccentric butterfly valve;
Selection and application of eccentric butterfly valve;