Abstract: A device for transport of material between chambers at different pressures, comprises a feed chamber, a main chamber having an upper housing with an inlet and a lower housing with an outlet. The feed chamber is coupled to the main chamber at the inlet, and a first slide valve opens and closes the inlet. A second slide valve for opening land closing the outlet may be provided. At least one hollow gasket with an essentially closed wall, preferably an inflatable gasket, is provided between the upper housing and the first slide valve for sealing the inlet; and, at least one gasket with an essentially closed wall, preferably an inflatable gasket, may be provided between the lower housing and the second slide valve for sealing the outlet. Alternatively, a first flap valve for opening and closing the inlet is provided which is pivotally coupled to the upper housing at one side.

Abstract: A rotary filter of the type described in U.S. Pat. No. 4,193,875 in which each of the filter disks, axially spaced on the rotating shaft, is subdivided into a plurality of sections or cells and each of the sections is connected by a tube to a fluid distributor or control head for evacuation, pressurization or the like. According to the invention, each of the passages connecting each section with the control head is formed by a unitary tube having an axially extending section, a bend and a radial section connected by the bend to the axial section. In the control head a disk fixed to the hollow shaft is provided in which the ends of the axial sections terminate removably and sealingly. The radial sections are fixed to the filter-segment carriers, e.g. by flanges and screws or bolts through these flanges.

Abstract: A rotary filter has a pressure vessel and a rotor from which a plurality of filter cells are suspended from outer portions of the rotor so that they clear a conveyor located proximal to the axis of rotation and upon which the filter cake is removed. Conduits are connected to the filter cells from a single distribution head for initially evacuating the cells in the filter stage and thereafter pressurizing the cells to dislodge the filter cake while the vessel remains under pressure. The filter cells can have the filter surfaces extending generally in axial planes or in axially spaced relationship in planes wherein a plurality of angularly spaced filters extend generally radially from respective filtrate conduits running axially along the outer part of the rotor.

Abstract: A multi-disk rotary filter in which a plurality of disks on a common shaft are partly immersed in a trough containing the suspension to be filtered and each of the filter disks is formed with a plurality of filter sectors or cells each connected to a control disk through which the filtrate is evacuated. According to the invention, each disk is formed with a cell carrier with a radial passage communicating with each sector and merging into an axial passage. The axially extending passages of at least some of the disks are formed at least in part by straight tube sections outwardly of the shaft.