| 摘要 |
In a distribution valve (1) applicable on a bottle (10) of the throw-away type is mounted a pin (8) with annular seal (18) comprising a lower piston (5) with faceting (6). The piston (5) is held in closed and sealed position with a seal (9) by a spring (11). Opening of the passage (4), originated by pressing downward the pin (8), is limited by a lower stop (19) which orevents said pin from accomplishing an excessively long travel which could cause cutting of said seal (18). <IMAGE> |
