Rommel, W. and Blass, E., 1990. Criteria for the Design of Plate Separators for the Separation of Droplets from Liquids. Preprints of ISEC 1990, Kyoto (Japan) The paper presents criteria for the estimative design of plate separators which have been deduced from experiments with droplet swarms. The criteria require the knowledge of the physical properties of the dispersion to be separated and its volumetric flow rate only. They allow the estimation of the area of the plates and the optimum load of the settler.