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Check Valves - 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 to prevent minimum turbulence, erosion and resistance to flow, The body-cover joint is maㅣe-female in ASME class 150-600 and ring type joint in class 900 and over, The cover material is identical to the body. The check valves are designed to give resistance against water hammer caused by a sudden reverse flow. Gasket materials can be supplied according to customer's requirement.

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Disc

The disc is constructed to have one piece to endure severe service conditions. It has a sufficient seating surface area which is ground and lapped to a mirror finish. The disc is of one-piece construction and is heat treated to deliver the required mechanical properties and hardness. It is securely fastened to the hinge by means of 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 and then seal welded and overlaid, if required. The forged seat ring is heat-treated to deliver the best mechanical properties and required hardness.

Arm

The disc stability is maintained while the disc is lifted by a hydrodynamic force at a flow including pulsating, The arm is designed to minimize water hammer because the disc goes to seat immediately upon cessation of flow due to heavy balanced weight.

Hinge

The hinge is designed to eliminate body penetration and allow ease of maintenance because all parts are accessible from the top, Body penetra4ion is sealed with blind flange and spiral-wound gasket. The hinge pin is located near the disc center of gravity resulting in minimizing 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 are supplied with RTJ end flanges on request.

Production Range

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Design Standards

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Standard Material Specifications

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Check Valves - Tilting Disc Check Valves

Body and Cover

Stainless Steel Tilting Disc Check Valve Tilting disc check valves are designed with a hinge point moved to the downstream side of the disc in order to increase the sensitivity to pressure and flow and aid the operation at low pressure differential.

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Tilting disc check valves are designed to be stable at low and pulsing flows, Even though tilting disc check valves generally have similar minimum required velocities to that of swing check valves, they can provide stable operation over a wider range of flows due to the hinge Sport being closer to the center of the disc

Due to the short disc travel distance to the valve seat, the response of the valves to pressure and flow is fast, reducing the development of reverse flow and therefore minimizing a slam without damage of the body, disc or seat.

Tilting disc check valves have two piece body design that should be removed fro the piping system to perform maintenance. They can be installed to prevent reversal of flow in horizontal or vertical pipe lines. In vertical lines, they can be used fluid flow is upward.

To avoid premature wear and noisy operation of the moving part, the proper size of the valve should be considered on the basis off low conditions



Production Range

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Design Standards

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Standard Material Specifications

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Technical Specifications Download