Swing Check Valves

Body and Cover
The body is cast with uniform sections and generous radius fillets to prevent stress on all sides, The body is spherical in shape toprevent minimum turbulence, erosion and resistance to flow, Thebody-cover joint is maㅣe-female in ASME class 150-600 and ringtype joint in class 900 and over, The cover material is identical tothe body. The check valves are designed to give resistanceagainst water hammer caused by a sudden reverse flow. Gasketmaterials can be supplied according to customer's requirement.

Disc
The disc is constructed to have one piece to endure severe sepvice conditions. It has a sufficient seating surface area which isground and lapped to a mirror finish. The disc is of one-piececonstruction and is heat treated to deliver the required mechanicalproilerties and hardness. It is securelv fastened to the hinge bymeans oi a lock nut with a cotter pin.

Seat Ring
The seat rings are designed to prevent any turbulence and damage by corrosion. They are forged or rolled in one piece andthen seal welded and overlaid, if required. The forged seat ring isheat-treated to deliver the best mechanical properties andrequired hardness.

ARM
The disc stability is maintained while the disc is lifted by a hydrodvnamic force at a flow including pulsating, The arm isdesigned to minimize water hammer because the disc goes toseat immediately upon cessation of flow due to heavy balancedweight.

Hinge
The hinge is designed to eliminate body penetration and allow ease of maintenance because all parts are accessible from thetop, Body penetra4ion is sealed with blind flange and spiral-woundgasket. The hinget pin is located near the disc center of gravityresulting in minimlzlng sealing surface radius rotation and velocity.

End Connections
The standard flange ends have a raised face serrated finish type which conforms to ASME B16.5 RF ASME class 600 valves aresupplied with RTJ end flanges on request.

Production Range

Design Standards

Standard Material Specifications