Tilting Disc Check Valve

Tilting Disc Check Valve is a type of non-return valve designed to allow flow in one direction while preventing backflow, with a disc that tilts rather than swings fully like a swing check valve. It combines features of both swing and lift check valves to improve efficiency and reduce water hammer.

1. Structure Of Tilting Disc Check Valve

Body: Typically cast steel, stainless steel, or alloy material depending on the medium.
Disc: Circular plate pivoted slightly off-center; it tilts open when forward flow passes.
Hinge/Pivot Mechanism: Supports the disc, allowing it to tilt and return quickly.
Seat: Metal-to-metal or soft-seated for sealing when disc closes.
Stop Pin/Arm (optional): Controls the range of motion of the disc.
Key Design Feature:
The pivot is located off-center, so the disc opens with a small flow and closes quickly with minimal reverse flow.

2. Performance Characteristics Of Tilting Disc Check Valve

Low Pressure Drop: Because the disc tilts instead of swinging fully, it allows smoother flow and lower turbulence.
Quick Closure: Reduces water hammer (sudden pressure surge when flow reverses).
Reliable Sealing: Can be designed for tight shut-off with soft or metal seats.
Bidirectional Flow Adaptability: Mainly designed for one-way flow, but some designs allow good sealing in multiple orientations.
Wide Size Range: Available from small to very large diameters (DN 50 – DN 2000+).

3. Applications Of Tilting Disc Check Valve

Tilting disc check valves are widely used in industries where reverse flow must be avoided and where piping systems are large or flow conditions are variable:
Power Plants: Steam, condensate, cooling water systems.
Water & Wastewater: Pump discharge lines to prevent backflow.
Oil & Gas: Crude oil, refined products, gas transmission lines.
Petrochemical & Refining: Process pipelines.
Marine & Offshore: Ballast and cooling water systems.
General Industry: Large pumping stations where water hammer prevention is critical.