Patent ID: 6994317

Claim:
A regulating vacuum valve comprising: a valve housing having a through-channel; first and second valve plates which lie in adjacent and parallel planes and are mounted so as to be adjustable in their planes and can be moved into the through-channel from different sides proceeding from an open position in which they lie laterally adjacent to the through-channel to form a through-opening through the valve, the size of the through-opening being adjustable; and an annular seal connection piece which is supported so as to be displaceable in the through-channel of the valve housing and is sealed relative to the valve housing by a first sealing ring; wherein, in order to provide a sealed state of the valve, said first valve plate is movable into a position in which it completely covers the through-channel and in which the seal connection piece is displaceable in the through-channel between a position in which it is lifted from the first valve plate to a position in which it is pressed against the first valve plate and sealed relative to the first valve plate by at least one second sealing ring.