The Vacuum Drum Filters has a broad field of application, amongst others in ore refining, hydrometallurgy, metallurgic, chemical and pharmaceutical industry, food processing and waste water treatment. A rotary drum vacuum filters (RDVF) is a continuous filter wherein the solid constituent in a pulp or slurry is separated by a porous filter cloth or other media rotated through the pulp or slurry, with vacuum applied to the inner surface to cause the solids to accumulate on the surface as a cake or layer through which the liquid is drawn.