We are offering check valves. check valves : series - cv03 stainless steel 316 check valves features • available in ss316, all wetted parts in accordance with nace mr01-75 • heat code traceable to certified material test report • instant shut off in upstream condition • the cracking pressure from 1 to 25 psig (0.07 to 1.8 bar) • variety of end configurations includes sealexcel® well-lok™ tube fittings, malefemale npt, bspt and bspp pipe connection • every valve is factory tested.