Abstract: A device for separating floating or precipitating components from a liquid comprising a number of substantially parallel inclined passages between superposed partitions, and provided with additional mutually parallel guiding baffles at least at one extremity of this assembly for guiding the liquid and/or separated components towards the effective part of these passages without restricting the cross-section of the assembly. One or more slotted baffles transversely to these guiding baffles may improve the uniformity of the supplied liquid flow, and the latter may also be supplied by means of a slotted supply duct which is directed transversely to the guiding baffles.