Porous metal filter elements Introduction Porous metal filter elements are manufactured in a broad range of materials and sizes. Cleaning of porous metal filter elements using ultrasonic To remove inert or insoluble solid from porous metal elements, ultrasonic cleaning is an most effective process. Evaluation of cleaning effectiveness To evaluate the effectiveness of cleaning and the integrity of the porous metal filter elements. It is necessary to flow test, and leak and/or bubble point test the elements after cleaning. For post– cleaning evaluation to be meaningful, new elements should be serialized and „base lined“, with flow and bubble point data recorded before they are put into service. Cleaning results Porous metal filter elements before ultrasonic cleaning Porous metal filter elements after ultrasonic cleaning