The new HI-FLO Thickener is altogether different from conventional thickener – with perforated plate or with spiral wire winding on drum face. As the name goes the HI-FLO Thickener has been especially designed to have an open area of practically 200% more of the conventional thickener of same size. Open area of conventional thickener (with perforated plate) is approximately 40% while in HI-FLO thickener, effective open area is 83%.