Flange butterfly valves are with simple and compact structure, stable positioning light weight. Benefit from the reasonable designs, the assembling, dismantling and installation of the flange butterfly valves are all easy to carry on. Besides, the minimized operating torque is provided, no matter what driving modes are applied, such as the lever, gear, pneumatic and electric actuators and so on. Most importantly, the high flow rate, low flow resistance and appreciated sealing cooperate to reach the satisfying performance.
Similarly, the major components of the flange butterfly valves are the valve body, disc, stem, valve seat. The body can be manufactured from the cast iron, ductile iron, carbon steel and other suitable ones. And the disc is mainly produced by the ductile iron, Ni-plate ductile iron, nylon-plated ductile iron and others. Whatever, the available manufacturing materials should be under the permission of the certain standards from the consideration of performance and safety. And the flange butterfly valves are suitable for allowing the media such as the flesh water, sewage, sea water, air, vapor, food, medicine, oils and alkalis and so on.
The flange butterfly valves are widely used in water supply and drainage.

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