Abstract: Hydrocyclones and separator assemblies a wherein the hydrocyclones installed in the separator assemblies by a push fit and are under no lateral tensile or compressive stress. The body has an interior defined by an axially-extending frusto-conical separating chamber which extends from an inlet chamber nearer an overflow end to an underflow outlet opening at an underflow end. The body also has a tangential inlet to the inlet chamber. A tubular vortex finder member fits through the overflow end of the body into a cooperating seat therein and is snap fitted in the body. The vortex-finder member is seated in a predetermined position in which a portion thereof extends through the inlet chamber to define the axial overflow outlet from the separating chamber, said portion having a helical guide surface to guide the inlet flow from the tangential inlet towards the separating chamber.

Abstract: A centrifugal solids-liquids separator comprises a rotatable hollow centrifuge drum at least a part of which is tapered, and which is rotatable about its axis, means for introducing a slurry of solids and liquids to be separated at a point along the length of the drum spaced from a wider end so that rotation of the drum tends to cause migration of the slurry towards the said wider end, and scraper conveyor means rotatable about an axis coincident with that of the drum and at a relative speed which is low in relation to the absolute speed of the drum, the scraper conveyor means being so mounted that they act in direct contact with the inside surface of the drum so as to displace solids contacted thereby towards the narrow end of the drum against the axial force induced by the rotation.

Abstract: A hydrocyclone comprising a vertical-axis separating chamber having an upper cylindrical portion and a lower, coaxial conically-tapering portion has: a tangential inlet at its upper end for a suspension to be classified; an upper, axial outlet for the overflow containing finer particles separated in the hydrocyclone in use; a lower axial outlet for the underflow containing coarser particles; and a hollow spigot surrounding the upper outlet and projecting into the separating chamber. The separation of coarse particles from the overflow is improved by the provision of an extension tube extending coaxially from the spigot into the separating chamber.