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Butterfly Valve Standard specifications Design,manufacture standard GB/T12238-2008 API609 Face to face GB/T12221 ASME B16.10 Flange standard GB/T911331 GB/T17241.6 ANSI B16.1 ANSI B16.2 Inspection and test GB/T13927 API609 Nominal diameter 50 2200mm 2” 86” Nominal pressure 0.6Mpa 1.0Mpa 1.6Mpa 2.SMpa 2.5Mpa 150Lb Pressure test Strength 0.9Mpa 1.5Mpa 2.4Mpa 3.0Mpa 3.75Mpa 3.0Mpa Seal 0.66Mpa 1.1Mpa 1.76Mpa 2.2Mpa 2.75Mpa 2.2Mpa Low seal 0.6 Mpa 0.6Mpa Actuated type Manual, pneumatic,electrical,hydraulic Main part material Part Name Cast Iron Series Carbon Steel Series Stainless Steel Serie Plate HT200 HT200 HT200 Hexagon screw 35CrMoA 35CrMoA 1Cr17Ni2 Gland QT450 QT450/WCB CF8 O-ring NBR/EPDM NBR/EPDM EPDM/FPM Packing Graphite/PTFE Graphite/PTFE Graphite/PTFE Packing-ring 304 304 304/316 Bearing Composite materials Composite materials Composite materials/Cr stainless steel Flat key 45#/304 45#/304 45#/316 Pin 45#/316 45#/316 Cr stainless steel Stem 45#/2Cr13 45#/2Cr13 2Cr13/17-4PH Limit Bolt 1Cr17Ni2 1Cr17Ni2 1Cr17Ni2 Limit nut 1Cr18Ni9 1Cr18Ni9 1Cr18Ni9 Body QT450 WCB CF8 Circlip 304 304 304/316 Gasket Graphite/PTFE Graphite/PTFE Graphite/PTFE End cap Q235A Q235A 304 Seat Copper alloy /stainless steel Stainless steel _ Disc QT450 QT450/WCB CF8 Seal NBR NBR/PTFE PTFE Plate ring Q235A Q235A 304 Set screws 35CrMoA 35CrMoA 1Cr17Ni2 Suitable temperature ≤80°C ≤80°C ≤120°C Suitable medium Water,air,oil Water,air,oil Nitric acid, acetic acid and other corrosive media