Check valve
The Check Valve is designed to allow fluid flow in one direction while automatically preventing backflow. Featuring robust construction, reliable sealing, and rapid response, it protects critical equipment from damage caused by reverse flow. Suitable for water, oil, gas, steam, and chemical applications, it offers dependable performance with minimal maintenance.
Check valve
A Check Valve, also known as a Non-Return Valve (NRV), is an automatic valve that permits fluid flow in one direction and prevents reverse flow. It operates without external power, utilizing fluid pressure to open and close the valve disc automatically.
Available in swing, lift, wafer, dual plate, axial flow, piston, and ball-type designs, check valves are widely used to protect pumps, compressors, turbines, and process equipment. Manufactured from carbon steel, stainless steel, alloy steel, duplex stainless steel, and special alloys, they provide excellent durability under demanding industrial conditions.
Our Check Valves are manufactured and tested according to international standards:
Check valve
| Parameter | Specification |
|---|---|
| Product Name | Check Valve |
| Valve Type | Swing, Lift, Wafer, Dual Plate, Axial Flow, Ball Type |
| Nominal Size | DN15 – DN2000 |
| Pressure Rating | PN10 – PN420 |
| ANSI Class | Class 150 – Class 2500 |
| Body Material | Carbon Steel, Stainless Steel, Duplex Steel, Alloy Steel |
| Disc Material | Stainless Steel, Bronze, Stellite Overlay |
| Seat Material | Metal Seat, PTFE, RPTFE, PEEK |
| Connection Type | Flanged, Wafer, Lug, Threaded, Welded |
| Installation | Horizontal or Vertical |
| Temperature Range | -196°C to +650°C |
| Leakage Standard | API 598 / ISO 5208 |
| Design Standard | API 594, API 6D, ASME B16.34 |
| Applicable Media | Water, Oil, Gas, Steam, Chemical Fluids |
Check valve
Prevents reverse flow in transmission pipelines, compressor stations, and production facilities.
Protects turbines, pumps, boiler feedwater systems, and steam pipelines.
Ensures process safety in hydrocarbon and chemical fluid handling systems.
Prevents contamination and reverse flow in municipal and industrial water networks.
Maintains directional flow in heating, cooling, and circulation systems.
Provides reliable backflow protection in shipbuilding and offshore platform piping systems.
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%.
