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Handle Butterfly Valve semi-lug wafer short type Features: Center line design 1:Its precess double "D" disc to stem connection drives the disc without the need of screws or pins,this design allows for higher CV, easy disassembly and reduced disc. 2:A pair of stem bearing assembled around the top and bottom stems prevent stem galling and stabilize valve operating torque for smooth and trouble-free disc rotation. 3:EPDM"O" ring and the-self "O" ring of seat come into being double direction's seating and preventing media from leaage . 4:Body is epoxy coating intermally and extermally, have best corrosive resistance. 5:Direct on-site mounting of actuators which are provided with ISO5211valve mounting flanges. 6:Face to face dimension metts the standard of ISO5752-1998. Material of main parts Body: Cast LronDuctile LronCast SteelStainless Steel304Stainless Steel316. Disc: Stainless SteelDuctile Lron Coated by NickelDuctile Lron Coated by NylonDuctile Lron Coated by Vulcanized RubberStainless Steel316Aluminum Bronze. Stem: Stainless Steel316/304/416. Seat: NBREPDM ,Fluorine Rubber,Silicon Rubber,High-temperature EPDM, Wear Resistance PTFE etc. Normal Diameter: DN40-DN150 Normal Pressure: PN1.0-1.6Mpa Applicable Mwdium: WaterSaltAacidSodaNaturalGasAirMellowOilFoodand Steam etc. Temperature Range: -10oC-130oC Main technical date DN:DN40 - 1200 PN:1.0 - 1.6 Mpa Body Test Pressure: PN*1.5 Sealing Test Pressure: PN*1.1 Coated surface:Epoxy polyester,Nylon11,Pain,Epoxy. Tpye of Operation:Handle,Gearbox,Electric and Gearbox with Signal. Temperature Range:-10 oC- 150oC Applicable Medium:WaterSaltAacidSodaNaturalGasAirMellowOilFoodand Steam etc. Optional Material: Body:Cast LronDuctile LronCast SteelStainless Steel 40mm-600mm Disc:Stainless SteelDuctile Lron Coated by NickelDuctile Lron Coated by NylonDuctile Lron Coated by Vulcanized RubberStainless Steel316Aluminum Bronze. 40mm-1200mm Stem:Stainless Steel316/304/416/410/431. Seat:NBREPDM ,Fluorine Rubber,Silicon Rubber,High-temperature EPDM, Wear Resistance PTFE etc.40mm-1200mm Adopting Standard List: DESIGN&MANUFACTURE&ACCEPTANCE:ISO 10631-1991 (GB/T 12238-1989) FACE TO FACE DIMESION:ISO 5752-1988 (GB/T 12221-1989) FLANGE CONNCTION STANDARD:ISO7005.2 (GB 9113-1988) INSPECTION STANDARD:ISO5208-1987 (GB/T 13927-1992) VALVE SIGN:ISO5209-1987 (GB 12220-1989) OPERATION CONNECTION STANDARD:ISO/DIN 5211-2001(GB 12223-1989) DELIVER STANDARD: - (GB/T 12252)