Fully Welded Ball Valve
Fully welded ball valves are made of high-quality forged material. 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.
The fully welded ball valve can be butt welded ends or flanged ends according to the customer's request.
The body is made from three forged parts, and its all-welded construction has fewer leak paths than bolted-body ball valves. 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 with non-destructive tests.
A 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.
- Size
- 2" - 48"
- Pressure Rating
- Class 150 -2500
- End Connections
- Flanged, Butt Welded
The fully welded ball valve design combines the maximum strength at the minimum weight, as well as a high resistance to pipeline internal and external stress.
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
Main Features:
Fully welded body
Forged body
Trunnion mounted ball valve
Soft, or metal-seated
DBB - Automatic cavity relief to prevent overpressure in the body cavity (self-relieving seats)
DIB seat (optional)
Extended stem for underground burried service
Non-destructive tests (X-ray etc. ) are performed as per ASME on weld joints of the body.
Pups pieces - unpon request
Stem grease injectors - unpon request
Seat grease injection - unpon request
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
