A105 Forged Steel Swing Check Valve – Class 800 NPT/SW with Hard-Faced Seats

A swing check valve allows fluid to flow in one direction while automatically preventing reverse flow. The swing-type disc opens fully during forward flow and closes when flow reverses, protecting pumps, pipelines, and downstream equipment from damage caused by backflow or pressure surges.

Forged steel swing check valves are ideal for high-pressure and high-temperature industrial systems, including chemical, petrochemical, and power generation pipelines. They are suitable for service where strength, durability, and tight sealing are critical.

ASTM A105 forged steel provides excellent mechanical strength and resistance to high-pressure conditions, while hard-faced seats (ASTM A182 F6a + Stellite) ensure exceptional wear resistance and long-term sealing integrity even under repeated high-pressure and temperature cycles.

Class 800 refers to the valve’s pressure–temperature rating according to ANSI B16.34, suitable for demanding service. NPT threads conform to ASME B1.20.1 for precise, leak-tight connections, while socket weld ends conform to ASME B16.11, allowing secure, welded connections in compact piping systems.

Graphite gaskets provide effective sealing at elevated temperatures, while the swing-type disc ensures smooth, low-resistance flow. Combined with the hard-faced seats, these features ensure durable, maintenance-free operation in challenging industrial conditions.