Industry News

Double Eccentric Butterfly Valve Advantage

2022-05-25

Double eccentric butterfly valve is also called high performance butterfly valve, mainly suitable for water plant, power plant, steel smelting, chemical industry, water source engineering, environmental facilities construction and other system drainage, especially suitable for the waterway pipeline, as the use of regulation and closure equipment.  Compared with the midline butterfly valve, 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, the lower the cost.  But because there is a butterfly plate in the middle, the flow resistance is large, so less than DN200 butterfly valve is not very meaningful.  

 

Double eccentric butterfly valve is further improved on the basis of single eccentric butterfly valve. The structural characteristics of the valve stem axis deviates from the center of butterfly plate, also deviates from the body center.  Double eccentric effect makes the valve is opened after the butterfly plate can quickly from the valve seat, greatly eliminate the unnecessary excessive extrusion and scraping of butterfly plate and valve seat, reduce the opening resistance distance,reduce wear,improve the life of the valve seat.  Scraping is greatly reduced, but also makes the double eccentric butterfly valve can also use metal seat, improve the application of butterfly valve in the field of high temperature.  

 

Double eccentric butterfly valve on the basis of further improvement molding is widely used double eccentric butterfly valve.  The structural characteristics of the valve stem axis deviates from the center of butterfly plate, also deviates from the body center.  Double eccentric effect makes the valve is opened after the butterfly plate can quickly from the valve seat, greatly eliminate the unnecessary excessive extrusion and scraping of butterfly plate and valve seat, reduce the opening resistance distance, reduce wear, improve the life of the valve seat.