Abstract: A separating device for separating two liquids of different specific gravities employs a basin and a separator unit therein which has flow ways spaced one above the other formed of imperforate, upwardly inclined inverted V-shaped plates for the flow of the liquid of lighter specific gravity toward the apex of each plate and upwardly in the direction of the length of the plates. The inlet for the liquids of different specific gravities is adjacent the lower extremities of the plates and the outlets for the cleaned liquid and for the lighter liquid separated in the separator unit is at the upper extremities of the plates which are near the upper extremities of the wall of the basin.