Standards:API,BS,MSS,ASMME,ASTM,GB Manufacturing standards -Design:ASME B16.34 -Pressure-Temp.Rating:ASME B16.34 -Face to Face dimension:ASME B16.10 -Flanged Ends:ASME B16.5(upto24) -BuffWeld ends:ASMEB16.25 -Pressure Test:API 598 Manufacturing Range -Ratings:From 150 Lbs.up to 900 Lbs -Sizes:2''up to 24'' -Applicable Temperature:-64~560℃ characteristics Description: Bolted bonnet OS&Y,Lifting Stem Y-type Body Back seal design Be Used to high abrasion, with particle medium project Sealing surface weld Satellite or Tungsten carbide Connection: Flange(RF.FF.RTJ)or Welded(SW) operation -Manual(handwheel or gearbox) -Actuated(Electric,pneumatic or hydraulic)