The filter press operates with the logic of collecting the solid particles between the filter plates and removing the liquid phase out of the equipment by filtering the sludge from the filter cloths clothed on the filter press plates. Depending on the physico-chemical properties of the solid-liquid mixture to be filtered; polypropylene, cotton, staple fibers or other raw materials. High-pressure pumps that supply filter presses can be selected from air diaphragm pumps, monopumps, gear oil pumps or lobe pumps. Centrifugal logic pumps are generally not preferred in filter press systems.

Dewatering rate to be taken from filter press is higher than its counterpart decanter and belt press equipment. Feeding is done by pressure pumps in the form of compressed plates with high hydraulic pressure. The solids accumulated in the inter-plate volume are removed by opening the plates. Cake discharge is designed manually or automatically depending on the system requirement and customer preference. Filter presses are used not only in treatment plants but also in different industries such as mining, oil filtration, marble, chemical, silicate, coating (zinc-phosphate) baths, acid filtration and food.