Welded check valve
The Welded Check Valve is designed for high-pressure and high-temperature pipeline systems requiring permanent, leak-proof connections. Featuring butt weld or socket weld ends, it automatically prevents reverse flow while minimizing pressure loss. Its rugged construction ensures superior durability, reliable sealing, and long service life in demanding industrial environments.
Welded check valve
The Welded Check Valve is a non-return valve engineered for critical piping systems where welded connections provide maximum strength and leak prevention. The valve automatically allows forward flow and closes upon flow reversal, protecting pumps, compressors, boilers, and process equipment from backflow damage.
Manufactured from forged steel, carbon steel, alloy steel, stainless steel, and special high-temperature materials, the valve is designed to perform under extreme pressure and temperature conditions. Its compact welded-end construction reduces potential leakage points and improves overall system integrity.
Our Welded Check Valves are manufactured and tested according to international standards:
Welded check valve
| Parameter | Specification |
|---|---|
| Product Name | Welded Check Valve |
| Valve Type | Lift Check Valve / Swing Check Valve |
| Nominal Size | DN15 – DN1200 |
| Pressure Rating | PN16 – PN420 |
| ANSI Class | Class 150 – Class 2500 |
| Body Material | Forged Steel, Carbon Steel, Alloy Steel, Stainless Steel |
| Disc Material | Stainless Steel, Alloy Steel, Stellite Overlay |
| Seat Material | Metal Seat, Hard-Faced Alloy |
| Connection Type | Butt Weld (BW), Socket Weld (SW) |
| 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 | Steam, Water, Oil, Gas, Chemical Fluids |
Welded check valve
Protects transmission pipelines, compressor stations, and processing facilities from reverse flow.
Used in boiler feedwater systems, steam pipelines, and turbine auxiliary systems.
Provides reliable backflow prevention in high-pressure chemical process lines.
Suitable for high-temperature and high-pressure fluid transportation networks.
Available in cryogenic designs for liquefied gas storage and transportation systems.
Ensures leak-free operation in critical offshore platform and shipboard 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%.
