... Features as below:Wafer Type Design, Dual Plate or Single Disc, Half Lug or Fully Lugged Types.Design & Manufacture: API 594, ... API 6D or ISOPres-temperature Ratings: ANSI B16.34, DIN 2401 or ISOInspection and Test: API 598, API ... , Stainless Steel, Duplex, Alloy, Cast Iron and Ductile Iron etc.or Equivalent, Available also in low temperature steels, low alloy steels and ...