Test Working pressurePN10PN16 Shell pressure1.5MPa2.4MPa Seat pressure1.1Mpa1.76MPa. Main Parts and Materials NumberPart NameMaterial 1BodyCast iron or Ductile iron 2Seat ringBrass/Bronze 3DiscDuctile iron 4StemStainless steel 5BonnetDuctile iron 6YokeDuctile iron 7Hand wheelCast iron or Ductile iron. Application 1Face to face is according to DIN3202-F4 2Flange drilled is according to DIN2532/2533/2501 3Nominal pressure PN10/PN16.