The tubular valve body structure has a simple manufacturing process, which is convenient for assembly and positioning. The mould requirement for the blank part manufacturing is simple, and it is convenient to fix the ball with the support plate.

The structure has good manufacturability and is convenient to install the part of stem, especially suitable for large diameter fully welded ball valve. (Two-body adopted to small-diameter fully-welded ball valves, three-body adopted to big-diameter fully-welded ball valves)