| 摘要 |
<p>A shut-off device, in particular for application in the extraction of natural gas and mineral oil, has a shut-off housing ( 3 ) comprising an admission channel ( 2 ) and in which a shut-off organ ( 4 ) is supported in an adjustable manner relative to the admission channel ( 2 ) between an open position ( 5 ) and a closed position ( 6 ), and has an actuating device ( 7 ) at least for adjusting the shut-off organ ( 4 ) from the open position ( 5 ) into the closed position ( 6 ). To improve such a shut-off device in that, especially in an emergency, fast adjustment of the shut-off organ to the closed position is possible in a constructively easy and economical manner, the actuating device comprises a gas generation device ( 8 ) for the production of an adjustment pressure for adjusting the shut-off organ ( 4 ) in the direction of the close position ( 6 ).</p> |
