Wafer tilting type check valve
The wafer tilting type check valve is a space-efficient, non-return device widely used in industrial piping where short installation length and low-pressure loss are critical. For systems that require a rigid, bolted connection, the Flanged tilting disc check valve offers a rugged alternative with the same tilting disc principle. In applications where both wafer and flanged patterns are evaluated, the Tilting Disc Check Valve design consistently delivers rapid closure, reduced water hammer, and dependable performance across a broad range of fluids and temperatures.
The Wafer tilting type check valve is engineered to fit directly between standard pipe flanges, drastically reducing weight and simplifying maintenance. Its disc pivots on a shaft located above the disc centre, enabling it to tilt open with minimal flow resistance and snap shut before reverse flow can establish. This hydraulic behaviour makes it ideal for pump discharge, compressor protection, and HVAC circuits. The body is typically manufactured from cast iron, ductile iron, or stainless steel, with seat options including EPDM, NBR, PTFE, and metal, allowing compatibility with water, oils, gases, and low-pressure steam.
Key Features
- Wafer body design – lightweight, compact, and easy to install between flanges
- Tilting disc mechanism – faster closing than swing check valves, minimising slam and pressure surges
- Short face-to-face dimension – requires less pipeline space
- Available with soft or metal seats for media versatility
- Low cracking pressure – suitable for low-pressure systems
- Can be mounted horizontally or vertically (upward flow)
- Maintenance-friendly – disc can be inspected without removing the entire body from the pipeline
Technical Specifications
| Parameter | Specification |
|---|---|
| Valve Type | Wafer Tilting Disc Check Valve |
| Size Range | DN50 – DN600 (2″ – 24″) |
| Pressure Rating | PN10 / PN16 / PN25 / PN40; Class 150 / Class 300 |
| Body Materials | Cast Iron (GG25), Ductile Iron (GGG40/50), Carbon Steel (WCB), Stainless Steel (CF8, CF8M, CF3M) |
| Disc Materials | Stainless Steel 304, 316, Duplex 2205, Aluminium Bronze |
| Seat Materials | EPDM, NBR, Viton, PTFE, Metal (Stainless Steel Overlay) |
| Connection Standard | Wafer – fits between EN 1092, ASME B16.5, or JIS flanges |
| Face-to-Face | Per EN 558 Series 16 or API 594 (short pattern) |
| Working Temperature | -20°C to +200°C (depends on seat and body material) |
| Suitable Media | Water, Oil, Compressed Air, Gas, Low-Pressure Steam, Weak Chemicals |
| Leakage Class | Zero leakage (soft seat) or API 598 allowable rate (metal seat) |
| Testing Standard | API 598 / EN 12266-1 |
These valves are manufactured under strict quality controls, with each unit undergoing hydrostatic shell and seat leakage tests. The tilting disc assembly is precision-machined to ensure consistent disc alignment, while the shaft is supported by bearings designed to handle thousands of cycles without binding. For aggressive media, full stainless steel internals and PTFE seats are available. The wafer tilting type check valve thus bridges the gap between low-cost wafer mechanisms and high-cycle flanged designs, providing engineers with a reliable solution that does not compromise on performance or service life.
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