Abstract: A filter mat for use in reverse rinsing filter devices consisting of at least two filter mat devices and one static rigid filter mat base. The filter mat produces evenly distributed reverse rinse channels that provide even distribution of pressure in the filter mat.

Abstract: In a valve on a processing plant in the chemical apparatus field, which has a valve housing, a feed flange and a discharge shaft, together with a valve seat arranged in the vicinity of the feed flange and an associated valve cone, at least the contacting parts of the valve seat and valve cone are made from metal. The inner wall of the valve seat formed as a surface of revolution is provided in the flow direction with two adjacent areas having different diameters and which are separated from one another by an edge. When the valve is closed, only the valve seat edge engages on the circumferential surface of the valve cone. In the first area facing the feed flange, the valve seat wall preferably has a substantially constant radius which continuously increases in the flow direction in the following second area, resulting in particularly reliable closing behavior. This can be further aided by an axially acting spring element.

Abstract: There is disclosed a nutsch filter having blades fitted to a central, vertically positioned hollow shaft by a hollow arm, the blades having a plough-like cutting edge and a spatula-like bottom surface acting in the opposite movement direction. A discharge pipe, arranged concentrically to the hollow shaft, is axially displaceable. The discharge pipe is moved upwards against a cover for sealing the filter casing. The filtration or resuspension or drying of the filter cake takes place in this position. In order to discharge the compressed filter cake, the upper edge of the discharge pipe is set by the blades to the level of the paring or skimming process. Paring of the filter cake and conveying of the pared mass into the central discharge pipe opening takes place in a single operation by means of the blades. On drying, hot air or a hot fluid is passed through the cavities of the arm as well as the parts connected thereto.

Abstract: The present invention refers to a heating and air-conditioning system for one or multi-storied buildings with multi-glazed windows contained in the facade of the building. A fresh air entrance arrangement is disposed below at least one of these windows on the outside of the facade of the building. A fresh air processing device is connected to the fresh air entrance arrangement with means to filter, heat or cool and humidify the fresh air and to expel the same over a distributing cavity arranged beneath the window. The distributing cavity is connected to a window cavity between the panes of the multi-glazed windows. An entrance opening arranged at the top end of the window, connected to the window cavity, extends over a good part of the width of the window and opens out toward the room to be air conditioned. A stale air flow out arrangement controlled by valves directs stale air out of the room.

Abstract: An industrial filtering apparatus in which the filter cake can be removed automatically by scraping layers of solid from the cake with paring devices which are associated with screw conveyors for transporting the solid to the center of the housing and depositing it in a removal pipe. The mouth of the removal pipe through which the cake falls is completely unobstructed by structural members. The paring devices can also be used in a different mode to smooth out cracks and compact the cake. There is also an independent revolving device for breaking up the cake which can be used in conjunction with a sprinkler head to ensure particularly intensive and intimate washing and slurrying of the cake. The paring device, its associated screw conveyors and the removal pipe can be raised and lowered, as can the device for breaking up the cake, thus making adjustment to any filter cake thickness possible.