| 摘要 |
A gas tight shut-off valve for a material charging or discharging lock includes a valve closing element that is movable relative to a valve a seat, between a first position which the valve closing element and the annular valve seat can be axially pressed together, and a second position in which the valve closing element is located laterally of the discharge opening in the valve seat. A soft sealing element is associated either with the annular valve seat or with the valve closing element. The valve further includes a heat protecting element which is movable between a first position in which it covers the soft sealing element when the valve closing element is in its second position, and a second position in which it uncovers the soft sealing element.
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