| 摘要 |
<p>The device has a movable closing element that is provided between a fluid inlet (6) and a fluid outlet (5). The closing element in a first position configured to seal a portion of the fluid inlet to a region of the fluid outlet. The closing element is movable from the first position in a first direction. The movable closing element is provided with buoyancy section configured for generating lifting force on the closing element in a second direction opposing the first direction.</p> |
