Fully Welded Ball Valve
Fully welded ball valves are made of high-quality forged steel. Fully welded trunnion mounted ball valves with an extended stem are ideal for underground buried service or pipeline.
Relia Valve is a fully welded ball valve manufacturer in China with API 6D, API 607 and CE certificates. We have a full range of fully welded ball valves for onshore and offshore topside applications in the oil and gas transmission industry. We supply all our welded ball valves at the best price.
- Size
- 2" - 48"
- Pressure Rating
- Class 150 -2500
- End Connections
- Flanged, Butt Welded
Key Features:
- Advanced Design: The fully welded ball valve design combines the maximum strength at the minimum weight, as well as high resistance to pipeline internal and external stress.
- Quality Material: The body is made from three forged parts, and its all-welded construction has fewer leak paths than bolted-body ball valves.
- Welding Specifications: All welding is performed according to ASME Section IX, and all welding processes are qualified. The welding for the valve body is to be performed on weld joints;non-destructive tests (such as X-ray) are to be done as per ASME B16.34.
- Automatic Over-pressure Relieving: Cavity-relief valve is installed in the body to relieve any overpressurization encountered during service or testing. By pressurizing the body cavity, the integrity of sealing surfaces can be monitored without pressure in the pipeline.
- Zero-Leakage Sealing: A flexible seal ring embedded in the valve seat, combined with a preloaded spring mechanism, ensures tight sealing that adapts to pressure and temperature fluctuations, minimizing leakage risks.
- Robust Construction: Integral welded valve body eliminates external leakage, enhancing reliability and safety.
- Fire-Safe Compliance: Fire-resistant design incorporates flexible graphite packing or stainless steel/graphite composites at all critical points, meeting stringent fire safety standards.
- Extended Service Life: Advanced support plate technology reduces operational torque and increases durability, significantly prolonging valve lifespan.
Options:
- Extended stem for underground burried service
- Pups pieces - unpon request
- Stem grease injectors - unpon request
- Seat grease injection - unpon request
Body Material:
- Carbon steel, optional partial or full CRA overlay on the wetted area
- Low alloy carbon steel, optional partial or full CRA overlay on the wetted areas.
- Stainless Steel
- Duplex or Superduplex stainless steel
Seat Material:
- Soft or Metal Seat
Operator
- Lever or gear
- Pneumatic
- Hydraulic
- Electric
- Gas Over Oil
Standard Specifications
| Design | API 6D, API 6DSS, ASME B16.34, ISO 14313, ISO 17292 | Pressure Rating | ASME B16.34, EN 1092-1, ISO 17292 |
| Wall Thickness | ASME B16.34, ASME VIII Div. I, ISO 17292 | Face to Face | API 6D, ASME B16.10 Long pattern |
| BW Ends | ASME B16.25 | Flange Ends | ASME B16.5/ASME B16.47 |
| Fire Safe | API 607, API 6FA, BS 6755, ISO 10497-5 | Figitive Emission | ISO 15848/1 |
| Leakage rate | ISO 5208 rate A soft seated, rate D metal seated | Valve Test | API 6D/API 598 |
Fully Welded Ball Valve Explosive Drawing
Leave Us Your Info
Could you please kindly fulfill the following information when enquiring:
Valve type (ball, gate, globe, check etc.), valve size, pressure class, valve material, and end connection (flanged, butt welding etc.)