The application difference between flange and wafer butterfly valve
Butterfly valves are not only widely used in petroleum, gas, chemical and water treatment, but also in the c irculating water system of power plants. Wafer and flange are two type s of connecting.Flange butterfly valve body has flange on both ends, connected to pipe flange. There are no flanges on both ends of the butterfly valve body, only guide bolt holes, and the valve is connected to the flange of the pipe end with a set of bolts/nuts. It's cheap and light for wafer butterfly valve . The bolt length of wafer butterfly valve is longer, and the installation precision is higher than flange butterfly . If the flange of pipe is not correct on both sides, the bolt will be subjected to greater shear load , and the valve will leak easily. In contrast, the disassembly of the wafer butterfly valve is convenient, the valve cost is low, but the disadvantage is that one sealing surface problem, two sealing surface must be opened. The seal ing of Flange butterfly