| 摘要 |
<p>The ball valve has the peculiarity that the ball-shaped element (14) for cutting off the flow of fluid has a stop and stroke-limit wing (20) which is rigidly associated therewith and which cooperates with opposite abutment elements (9,10) defined in the hollow body (2) of the valve so as to respectively define, when the ball-shaped element is rotated, a flow-allowing stroke limit position and a flow-cutoff stroke limit position of the ball-shaped element in the hollow body of the valve. <IMAGE></p> |
