HOFFMANN Precoat Filters ASF are especially suited where other filter systems have reached their performance limits, such as in the machining of cast iron, hard metal or HSS. It is especially used for ultra-fine and clear filtration of oils, synthetic solutions, process water and other fluids where a clear filtrate down to nominally 3 is always required. In addition to their use in metal processing, the special fields of application also render HOFFMANN Precoat Filters ideal in the beverage and environmental industries, as single or central systems.