UNTERDRUCKREGLER FÜR EINE ENTFERNTE ZONE

摘要

A regulator, which may be used to regulate in a remote region a constant partial vacuum. The regulator controls the flow of gas from an environment, through a region and to an evacuation means. The regulator's fluid path is bounded on opposite sides by two plates, which may be hingedly mounted, so that the two plates are substantially parallel to each other. Each of the plates have a conduit side, facing the fluid path, and a side facing a reference pressure. The first plate's reference-pressure side may be exposed to the region's pressure, and the second plate's reference-pressure side may be exposed to the environment's pressure. The regulator also includes an impeder attached to the plates for variably impeding the flow through the path based on the position of the plates. Preferably, the impeder includes a fixed grate and a movable grate. The fixed grate does not move with respect to the path. The movable grate is hingedly attached to the plates at points distal from the pivot points. The two grates are disposed immediately adjacent to each other, so that as the movable grate moves with respect to the fixed grate the impedance on the flow varies.