Gate Valve OS&Y, Class 150, Flanges ends, Manual operation, Available Sizes (2" - 30"). Materials: Body & Bonnet: A216 Gr WCB, Seat Ring/Facing: A105/Co-Cr-W Face or A216 Gr WCB/Co-Cr-W Face, Wedge: 2"-6" (A 182 Gr F6a) & 8"-30 (A 216 Gr WCB/13% Cr Face)