Size: 2â-24â Pressure Rating: 150 LB, PN10, PN16 Material: Cast iron, Carbon Steel, Stainless Steel End: lug, wafer Operation: Manual, Pneumatic, Electric, Hydraulic Design & Manufacture Standard: MSS SP-81 Face to Face: MSS SP-81 End Connection: ASME B 16.5, EN1092-1 Test Standard: API598 Soft: NBR, EPDM, Viton, PTFE, Metal seal Uni-directional or Bi-directional Replaceable Seat