| 摘要 |
A valve for a container (1) for powder or fluid (2), where the valve comprises a valve housing (11) having an inlet for the powder or fluid, preferably connected to a discharge tube (3), and an outlet (20) for the powder or fluid, where a piston (12) is mounted in an interior cavity (24) of the valve housing so as to be displaceable in the longitudinal direction of the valve between two end positions, and where the piston (12) in one end position blocks the flow of powder or fluid between inlet (35) and outlet (20) whereas the piston (12) in its other end position unblocks the flow, characterized in that the valve further comprises an inlet (10) for supplying a gaseous propellant to the container (1) and that the piston (122) is displaced from the position in which it blocks the flow to an open position in response to the pressure of the gaseous propellant at the inlet (10) for the gaseous propellant. |
