The BoHiBar drum filters are equipped with exchangeable filter cells and are designed for steam pressure filtration The filters are operated to filter, wash and dewater fine-grained (x₅₀ < 5 µm] high quality inorganic pigments that are manufactured to different specifications and must all be filtered on the same filter units.

The BoHiBar drum filters achieve a cake moisture of < 20 % while parallel running conventional pressure filters achieve a moisture content of 30–35 %. This means a water reduction by steam pressure filtration of 280 kg per t solids. More than 2 kg water is removed from the filter cake per 1 kg steam applied which means a serious reduction in energy costs.

The BoHiBar drum filters can be quickly prepared for a product change thanks to exchangeable filter cells which allow an unparalleled quick re-clothing, and thanks to an automatically opening pressure vessel and excellent accessibility. This results in significantly reduced personnel costs for maintenance and cleaning.