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Double eccentric butterfly valve

Double eccentric butterfly valve is also called high performance butterfly valve. It is mainly used for system drainage of water plants, power plants, steel mill smelting, chemical industry, water source project, environmental facilities construction, etc. It is especially suitable for waterway pipelines and is used as regulation and interception equipment.

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    13884735099

Double eccentric butterfly valve is also called high performance butterfly valve. It is mainly used for system drainage of water plants, power plants, steel mill smelting, chemical industry, water source project, environmental facilities construction, etc. It is especially suitable for waterway pipelines and is used as regulation and interception equipment. Compared with the midline butterfly valve, the double eccentric butterfly valve is more resistant to high pressure, longer life and good stability. Compared with other valves, the larger the diameter, the lighter the material and the lower the cost. However, due to the butterfly plate in the middle, the flow resistance is large, so the butterfly valve smaller than DN200 does not make much sense.

 

   The double eccentric butterfly valve is further improved on the basis of a single eccentric butterfly valve. The structural feature is that the stem axis is offset from the center of the disc and from the center of the body. The double eccentric effect allows the disc to be quickly disengaged from the valve seat after the valve is opened, which greatly eliminates unnecessary over-squeezing and scraping of the disc and the valve seat, reduces the opening resistance, reduces wear and improves The seat life. The scraping is greatly reduced, and the double eccentric butterfly valve can also be used with a metal valve seat, which improves the application of the butterfly valve in the high temperature field.