| 摘要 |
A valve with ball of controlled deformation for fluid shut-off comprising an external containment body, inside which is arranged a shutter element, movable between a closure position and an opening position of the valve, the shutter element cooperating with one or more seats and providing for seal elements with respect to the containment body and to the shutter element, in which the shutter element provides for yielding zones in its spherical portions disposed downstream of the seats with respect to a pressure zone. Preferably the yielding zones are provided by notches produced on surface zones of the shutter elements in correspondence with the spherical portions.
|
