"317" Brand ST.ST.316 Safety Relief Valve Inlet/Outlet Double Femal Screwed. Seat/Disc/Cap: CF8M. Screwed End to BSPT, NPT. Without Lever. Set: 0.3-10 KGS. 317 Seal of Safety Relief Valve (Low Life & Full Bore) of T-One-Stranding Inc. Taiwan Manufacturer