| 摘要 |
<p>A valve device (1) comprises a pipe (3), a first closing element (10), mobile between a first position in which it leaves the pipe (3) open and a second position in which it seals the pipe (3) closed, a second closing element (11), mobile between a first position in which it leaves the pipe (3) open and a second position in which it seals the pipe (3) closed; the first and the second closing elements (10, 11), in their respective second closed positions, form a chamber (15) and the valve device (1) also comprises an orbital head (17) for supporting at least one nozzle (18) which dispenses a washing fluid (F), for cleaning the chamber (15).</p> |
