Technical Specification Design and Manufacture: ASME B16.34 End-to-end dimension: ASME/ANSI 16.10 Flange Standard: ASME/ANSI 16.5 Inspection and testing: API 598 Product Specification Body Material: A216/WCB, A351/CF8,A351/CF8M,A351/CF3,A351/CF3M, LCB,A536 Stem Material: SS304 ,SS410,SS416, SS420 Seat Material: PTFE, RPTEF,PPL Disc Steel: A216/WCB,A351/CF8,A351/CF8M,A351/CF3,A351/CF3M Lining Material??PTFE,RPTFE,PPL Nominal Diameter: NPS 2-20 Pressure Range: 150lb 300lb JIS DIN Connection Type: wafer connection, flange connection Operation Method: Manual, Worm Gear etc.