Introduction D71X Wafer Butterfly Valve handle the PTFE sealing butterfly valves and carbon steel or stainless steel valve plate, stem constitution. Water supply and drainage, power generation, oil and gas (natural gas), chemical industry, metallurgy, food (beverages), pharmaceutical, paper, shipbuilding, environmental protection and other engineering systems transport all kinds of corrosive, non-corrosive fluid medium suitable for piping and containers on for flow regulation and cut off the media. Features Features 1, simple and compact, lightweight, easy assembly and disassembly and repair. 2, the operating torque is small, light open and close rapidly turn 90 °. ; 3, flow resistance, flow characteristics inclined linear approximation, energy-saving effect. 4, reliable sealing, no leakage and long service life. 5, can be made of various materials, for a variety of media.