Isteel Top-Hinged Swing Check Valve

A swing check valve is a mechanical valve that controls fluid flow in one direction while automatically preventing reverse flow. This non-return valve is used in pipelines to protect pumps, equipment, and systems against backflow. iSteel India is a trusted industrial valve manufacturer that delivers advanced industrial valve solutions through innovation and technology. The valves are made of a disc attached to a hinge pin, which swings open during forward flow and closes when flow stops or reverses. Gravity and reverse pressure allow the disc to return to its seat, forming a seal that prevents backflow. Swing check valves are necessary in water systems, oil pipelines, power plants, and chemical processing facilities that require unidirectional flow for safety and efficiency.

A swing check valve operates through simple mechanical movement that is regulated by flow pressure and direction. The design supports smooth flow while stopping reverse movement without manual action.

Forward Flow Operation – During forward flow, fluid pressure forces the disc away from the valve seat.

Disc and Hinge Mechanism – The disc connects to a hinge pin fixed inside the valve body. This hinge allows free swinging motion.

Flow Direction Guidance – The valve body shape guides fluid movement in one direction. Proper alignment ensures stable disc motion.

Backflow Condition – When the flow slows or reverses, gravity and reverse pressure force the disc back.

Sealing and Backflow Prevention – The disc seals against the seat surface once closed.

Specification : Details

Size Range : Threaded ends from 1” to 3” (DN 25 to DN 80). Flanged ends from DN 40 to DN 400.

Connections : Threaded type BSP as per ISO 228-1 and NFE 03-005. Flanged type for mounting between PN 10, PN16, ANSI 150, and BS Table D & E on request.

Maximum Working Pressure : 10 bar, subject to material limits.

Operating Temperature : 10°C to +70°C

Material : Carbon Steel, Stainless Steel, and other alloys

Seat Leakage Standard : ISO 5208 Category A

Minimum Back Pressure for Tightness : 0.3 to 0.5 bar

Face to Face Dimensions : EN 558-1 Series 48, DIN 3202 F-6

Technical Performance : Full bore design, low pressure drop, smooth flow

Installation Orientation : Horizontal and vertical pipeline mounting

Testing : Seat test at 1.1 times nominal pressure. Body test at 1.5 times nominal pressure

Applications : Pumping stations handling clean water, sewage, viscous fluids

Refer Catalogue for more Information.