Mechanic Filtration-Separator Filter Mechanic filtration-separator filters ensure that the specific weight of the water is more than the centrifugal effect of sand, shaft, such as sand, shaft. Water Treatment and Seawater Purification The solids are collected downwards and are removed manually or automatically. The water is cleansed from the solids and fine particles, and the center of the separator is drawn to the output line through the vortex. The separator filter is produced from epoxy painted carbon steel or stainless-steel material. These products are used as pre-treatment equipment, especially because there is a high shaft in the areas of water treatment and seawater purification.