高业绩的蝴蝶阀门

High performance butterfly valve shall be capable of bi-directional, drop tight service to rated pressure, conforming to the design standards of ANSI B16.34 steel valves and ANSI B16.5 flange mating. Feature -Body High quality one piece casting which provides consistent uniformity. The valve body shall be constructed of carbon steel ASTM A216 WCB (or stainless steel ASTM A351, Grade CF8M), Body is available in Wafer, Double Flanged style. -Underneath Drawn Gland Packing Allows for direct mounting of actuation and ease of adjustment. -Seat An advanced design that provides a bidirectional interference and pressure assisted seal. This design achieves maximum seal at low, medium and high pressure. -Extended Neck Allows for two inches of pipe insulation. -Packing PTFE is a cup and cone system and Graphite is die formed rings for positive seals. -Bearings Made of Graphite impregnated or Reinforced PTFE impregnated 316 Stainless Steel to ensure long service life. -Stem Manufactured of high strength Stainless Steel to provide maximum strength and stability for high torque applications. -Disc Made of CF8M Stainless Steel and engineered to allow for quick release from the seat. This reduces the amount of torque needed to un-seat the disc. -Disc Taper Pins Pins are offset from the center of the stem which places them in compression rather than in sheer. This gives them a yield point greater than the stem itself. Pins are welded in place after final assembly and testing. -Integrally Cast Disc Position Stop Machined position stop on the body locates the disc in the seat to achieve maximum seat and seal life. Standard Designing & manufacturing are according to the regulations of API 609Flange is subject to ANSI 16.5Face-to- face dimension is by the regulation of enterprise standards and API609Pressure test is according to API598. Material Componentcarbon steelstainless steel MaterialUS standardMaterialUS BodyCarbon steelASTM A216-WCBS.S.ASTM A351-CF8MDiscS.S.ASTM A351-CF8MS.S.ASTM A351-CF8MPressure ringForged steelASTM A105(N)S.S.AISI 316Stem, PinsS.S.AISI 316S.S.AISI 316Seat & shaft sealPTFEPTFEVersion with PTFE seat Secondary seatS.S.AISI 316Version with double seat Primary seatPTFEPTFEVersion with fire-safe seat Secondary seatS.S.AISI 316 Shaft sealGraphite SeatAlloyed steelInconelVersion with metal seat Shaft sealGraphite