Importance

Loading Importance Indicators...

Abstract

A vacuum valve comprises a valve body (1) with an inner cavity (4) through which a main passageway leads between an inlet (2) and an outlet (3) of the vacuum valve and with a main valve seat (6) which surrounds the main passageway, a main closing member (5) which is adjustable in the inner cavity (4) of the valve body between an open position, in which it is lifted from the main valve seat (6) and in which the main passageway through the vacuum valve is open, and a closed position, in which it tightly contacts the main valve seat (6) and in which the main passageway through the vacuum valve is closed, and which has an inner cavity (10) through which an additional passageway leads and an additional valve seat (14) surrounding the additional passageway, an additional closing member (11) which is adjustable in the inner cavity (10) of the main closing member (5) between an open position, in which it is lifted from the additional valve seat (14) and in which the additional passageway through the vacuum valve is open, and a closed position in which it tightly contacts the additional valve seat (14) and in which the additional passageway through the vacuum valve is closed, wherein the additional passageway runs through a changeable intermediate space (43) between the main closing member (5) and the additional closing member (11), and the size of this intermediate space (43) is changeable by means of a rotation of the additional closing member (11) relative to the main closing member (5).

Loading the Abstract Image...

First Claim