Abstract: A radial multihydrocyclone provided with a plurality of superimposed flat discs made by moulding whereby in each disc there is recessed a plurality of radially oriented cyclones which with their drain ends open into a central passage in the disc and with their overflow end are positioned in the circumferential zone of the disc, while the two sides of the disc are interconnected by at least one eccentric passage, while for each cyclone in the disc a tangential supply duct is in communication with a common recess in the disc.

Abstract: A multihydrocyclone includes a plurality of structural units of parallel-connected hydrocyclones having their overflow pipes and drains opening into respective common headers for overflow fractions and for drain fractions. The headers are each formed by an assembly of discharge conduits which terminate into or combine into collecting conduits having a throughflow area which is at least substantially proportional to the local amounts of flow, so that in the discharge path of the fractions there are no reductions in the flow velocity which would give rise to clogging.