h performance butterfly valve, which can bear high pressure , with long longevity and good stability comparing with center line type butterfly valve.
2, comparing with other type valves, double flanged eccentric butterfly valve have light weight as the size becoming more big, which reduced the cost.
3, as there is a disc in the middle of the double eccentric butterfly valve, the flow resistance is big, for size bellow DN200 is insignificant to choose double flanged eccentric butterfl