Super large diameter check valve
The Super Large Diameter Check Valve is specifically engineered for large-scale fluid transportation systems. Designed with optimized flow passages and heavy-duty components, it effectively prevents reverse flow while minimizing pressure loss. Suitable for water, oil, gas, and industrial applications, the valve ensures reliable operation, equipment protection, and extended service life.
Super large diameter check valve
The Super Large Diameter Check Valve is designed for high-capacity pipeline systems requiring dependable backflow prevention and maximum flow efficiency. With nominal diameters reaching DN3000 and beyond, these valves are commonly used in municipal water supply projects, hydroelectric power stations, cooling water systems, and long-distance transmission pipelines.
Its optimized internal structure minimizes turbulence and pressure loss while ensuring rapid closure during flow reversal. Manufactured using high-strength materials and advanced machining technologies, the valve offers excellent durability, corrosion resistance, and operational reliability under demanding service conditions.
Our Super Large Diameter Check Valves are manufactured and tested according to international standards:
Super large diameter check valve
| Parameter | Specification |
|---|---|
| Product Name | Super Large Diameter Check Valve |
| Valve Type | Swing Check Valve / Axial Flow Check Valve / Buffer Check Valve |
| Nominal Size | DN500 – DN5000 |
| Pressure Rating | PN6 – PN100 |
| ANSI Class | Class 150 – Class 600 |
| Body Material | Carbon Steel, Ductile Iron, Stainless Steel, Duplex Steel |
| Disc Material | Stainless Steel, Duplex Steel, Hard-Faced Alloy |
| Seat Material | Metal Seat, EPDM, NBR, PTFE |
| Connection Type | Flanged, Double Flanged, Butt Weld |
| Installation | Horizontal or Vertical |
| Temperature Range | -29°C to +450°C |
| Leakage Standard | API 598 / ISO 5208 |
| Design Standard | API 594, API 6D, ASME B16.34 |
| Applicable Media | Water, Seawater, Oil, Gas, Steam, Industrial Fluids |
Super large diameter check valve
Prevents reverse flow in large-scale water transmission and distribution networks.
Protects turbines, pumps, and water conveyance systems from backflow and surge pressure.
Used in circulating water systems, cooling water networks, and auxiliary pipeline systems.
Provides reliable backflow prevention in large-diameter crude oil and natural gas pipelines.
Ensures one-way flow in pumping stations, treatment plants, and reservoir systems.
Protects pumps and equipment in high-capacity cooling water circulation networks.
Material customization plan
Customized 316L stainless steel valves forGerman chemical enterprises. Resistant tostrong corrosion, suitable for their acidicmedium transportation systems, with aservice life extended to over 8 years.
Structural optimization design
For the Saudi desert project, the valve stemsealing structure was changed to a doublebellows design to address the leakage issuein the high-temperature and dustyenvironment, and it was highly recognizedby the customers.
Interface standard adaptation
Customized API 600 standard valves for acertain company in the United States. Theflange size is fully compatible with ANSIB16.5, ensuring zero error during on-siteinstallation and reducing the constructionperiod by 30%.
