An ASTM A890 5A Check Valve is a valve made from cast duplex stainless steel, specifically designated under the ASTM A890 Grade 5A standard and identified by the UNS number J93404. This material possesses moderately high embodied energy and features a moderately high tensile strength coupled with moderately low ductility. This valves allow fluid flow in only one direction and typically incorporate two openings: one for fluid entry and the other for fluid exit. Available in various types tailored to diverse applications, check valves are commonly utilized in household items as well.