| 摘要 |
A metering chamber (7) is fixed by its upper end to the portion of a valve body (9) located, in the mounted state, inside the vial, an inlet passage being provided contacting the inside of the vial and the metering chamber and an outlet passage contacting the metering chamber and the outside of the valve. The inlet passage can be closed when the valve element (4) is in the open position and the outlet passage can be closed when the valve element (4) is in the closed position. In addition, the valve element can be moved beyond the open position into a third position, called short-circuit position, a third passage, called short-circuit passage, being provided to contact the inside of the vial and the outside of the valve. The short-circuit passage can be closed when the valve element (4) is in the closed position or the open position. |
