Test Working pressure10K Shell pressure21.1kg/cm2 Seat pressure15.0kg/cm2. Application 1Face to face is according to JIS-10K 2Flange drilled is according to JIS B2212 Packing: Plywood Cases Main Parts and Materials NumberPart NameMaterial 1BodyCast iron or Ductile iron 2Seat ringBrass/Bronze 3DiscCast iron or Ductile iron 4StemCast iron or Ductile iron 5BonnetStainless steel 6Hand wheelCast iron or Ductile iron.