Disposable cartridges for centrifugal separators

A base member for combining with a cover member to form a cartridge for a centrifugal separator, said base member comprising a sheet metal pressing having nozzles in recesses located and oriented such that pressurized fluid passing from the recessees through the nozzles will produce a reaction force to spin said base member about its central axis, each recess being in the form of a smoothly-contoured circumferential trough of gradually deepening section starting with minimum depth at the beginning of the trough remote from said nozzle and finishing with maximum depth near to the plane in which said nozzle lies, and the minimum depth beginning of each trough lying closely adjacent the maximum depth nozzle area of an adjacent trough such that the troughs extend over approximately 360.degree..

A disposable cartridge for a centrifugal separator for cleaning fuel or lubricating oil;

• said cartridge comprising a cover member, an inner flow directing and debris-retaining member, a base member, two bearings, one each associated with said cover member and said base member and wherein said base member is a sheet metal pressing having at least two nozzles therein and through which oil leaves said cartridge in a direction so as to produce a reaction force to spin said cartridge, said nozzles being provided in recesses in said base member, said recesses being in the form of smoothly-contoured circumferentially extending troughs of gradually depening section starting with minimum depth at the beginning of the trough remote from said nozzle and finishing with maximum depth near to the plane in which said nozzle lies, and each trough extending over approximately 360.degree. divided by the number of troughs.