Full Bore Trunnion Ball Valve
For the full bore trunnion ball valve, the bore diameter i.e hole in the ball has the same internal diameter as the pipe.
Contact Us: sales@reliavalve.com
Key Specifications / Features
For the full bore trunnion ball valve, the bore diameter i.e hole in the ball has the same internal diameter as the pipe.
The following table is the minimum bore size for full bore trunnion ball valves as per API 6D specifications.
Minimum Bore of Full Bore Trunnion Ball Valves
| Size | Minimum Bore (in mm) | ||||
| Inch | DN | Class 150-600 | Class 900 | Class 1500 | Class 2500 |
| 2″ | 50 | 49 | 49 | 49 | 42 |
| 3″ | 80 | 74 | 74 | 74 | 62 |
| 4″ | 100 | 100 | 100 | 100 | 87 |
| 6″ | 150 | 150 | 150 | 144 | 131 |
| 8″ | 200 | 201 | 201 | 192 | 179 |
| 10″ | 250 | 252 | 252 | 239 | 223 |
| 12″ | 300 | 303 | 303 | 287 | 265 |
| 14″ | 350 | 334 | 322 | 315 | – |
| 16″ | 400 | 385 | 373 | 360 | – |
| 18″ | 450 | 436 | 423 | 406 | – |
| 20″ | 500 | 487 | 471 | 454 | – |
| 24″ | 600 | 589 | 570 | 546 | – |
| 26″ | 650 | 633 | – | – | – |
| 28″ | 700 | 684 | 617 | – | – |
| 30″ | 750 | 735 | 712 | – | – |
| 32″ | 800 | 779 | – | – | – |
| 34″ | 850 | 830 | – | – | – |
| 36″ | 900 | 874 | 855 | – | – |
Full bore trunnion ball valves shall be unobstructed in the fully opened position and shall have an internal minimum cylindrical opening for categorizing bore size as pecified in the following table. When pipe is used in the construction of the valves, the pipe shall meet the tolerances of the applicable pipe specifications. Obturator and seat dimensions shall meet the following table.
Note: There is no restriction on upper limit of valve bore sizes.
When there is no minum bore dimensions listed for a valve pressure class and size stated in the following table, the size and bore shall be by agreement and the manufacture shall stamp the size and bore on nameplate.
Welding-end trunnion ball valves can require a smaller bore at the welding end to match the pipe.
Trunnion ball valves with a noncircular opening through the obturator shall not be considered full bore trunnion ball valves.
