With the development of the electric valve, the Industrial Valves has a lot of well-known at home and abroad to enterprise production electric valves, electric butterfly valve to the clamp is important in the field of industrial automation control execution unit electric butterfly valve can be used as pipe system to the clamp of the cut-off valve, control valve and check Industrial Valves. With manual control device, once appear, power failure, can temporarily use manual operation, not affect use. Electric butterfly valve is suitable for the need to flow control to the clamp. Because of the butterfly valve in the pipeline pressure loss is bigger, about three times the gate valve, so when choosing butterfly valves, piping system is affected by pressure loss should be considered, also should consider closing butterfly plate consistence of pipeline medium under pressure. Electric butterfly valve characteristics to the clamp, the following ( 1) Double eccentric structure, have the close tight sealing function, sealed performance is reliable. （ 2) Nitrile oil resistant rubber sealing deputy stainless steel material selection and matching, long service life. （ 3) Rubber sealing ring can be located in the body, but also on the butterfly plate, can be suitable for different characteristics of the media, for the user to choose from. （ 4) Butterfly plate adopts frame structure, high strength, large flow area, small flow resistance. （ 5) The overall of the lacquer that bake, can effectively prevent rust and replace the sealing seat sealing materials, can be used in different medium. （ 6) This valve should be installed with two-way sealing function, when not under the control of the medium flow direction, and is not affected by spatial location. It can be installed in any direction. （ 7) With small volume, light weight, reliable performance, simple, large flow capacity, especially suitable for medium is relatively clean liquid and gas.
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The major classifications of are os&y valve, resilient seal gate valve, os&y gate valve and resilient seated valve machines.