| 摘要 |
A cavity-free ball valve with a housing which has a through hole and in which a ball having a passage is supported such that it can rotate, having a control shaft which is supported in the housing such that it can rotate and is rotationally engaged with the shut-off ball, and having a shell-like ring consisting of material which forms a seal on each side of the ball and fills the cavity between the ball and the housing, each ring consisting of an inner ring element and an outer ring element. <IMAGE>
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