Large Diameter Swing Check Valve
- Engineered for Large Diameters: Features a robust construction capable of withstanding the high flow rates and pressures found in large-scale pipelines.
- Low Flow Resistance: The swing-type design ensures a nearly unobstructed flow path when fully open, minimizing pressure loss, which is ideal for high-volume applications.
- Water Hammer Mitigation: Specifically designed to address large-diameter challenges, it may include counterweights, damping cylinders, or tilted seats to slow disc closure and effectively prevent destructive water hammer.
- Easy Maintenance: Typically designed with a top-entry cover that allows for internal inspection and maintenance without removing the valve from the pipeline.
- Broad Applications: An indispensable backflow prevention device in large-scale water supply, hydraulic engineering, thermal power, and nuclear power projects.
The Large Diameter Swing Check Valve is an automatic valve specifically engineered for large-scale pipelines to prevent backflow. Its structure is similar to that of a standard swing check valve but is optimized for large-diameter applications, for instance, by incorporating a more robust body and swing arm, and often including damping devices to reduce water hammer upon disc closure. It operates automatically, opening with the forward flow of the medium and closing by gravity and back-pressure. These valves are widely used in large-scale water supply systems, sewage treatment plants, power station circulating water lines, and industrial hydraulic projects.
Product Specification
| Item | Standard |
|---|---|
| Design | BS1868, API 6D |
| Structure Length | ASME B16.10 |
| Connection flange | ASME B16.5, ASME B16.47 |
| Test and Inspection | API 598 |
| Pressure and temperature reference | ASME B16.34 |
Performance Parameter
| Parameter | 150(Lb) | 300(Lb) | 600(Lb) | 900(Lb) | 1500(Lb) |
|---|---|---|---|---|---|
| Nominal Pressure PN (MPa) | 2.0 | 5.0 | 10.0 | 15.0 | 25.0 |
| Case Test Pressure (MPa) | 3.0 | 7.5 | 15.0 | 22.5 | 37.5 |
| High-pressure Sealing Test pressure (MPa) | 2.2 | 5.5 | 11.0 | 16.5 | 27.5 |
| Maximum Working pressure (MPa) | ≤2.0 | ≤5.2 | ≤10.4 | ≤15.6 | ≤25.8 |
Main Components Material
| Part Name | Material |
|---|---|
| Body/Cover | Carbon Steel (WCB), Stainless Steel (CF8, CF8M) |
| Disc/Arm | Carbon Steel, Stainless Steel |
| Hinge Pin | 2Cr13, Stainless Steel |
| Sealing Face | Overlaid STL Alloy, Rubber, PTFE |
| Bolt/Nut | A193 B7/A194 2H, A193 B8/A194 8 |
No drawing available.
