Filtration equipment is used to separate solids from liquids or gases by using a filter medium that allows only the fluid or gas to pass through. Types of filtration equipment include gravity filtration, vacuum filtration, pressure filtration, and centrifugal separators. Specialized filters such as sand filters, carbon filters, ultra-filters, nano-filters, and reverse osmosis (RO) systems are designed for more precise filtration in various industrial and water treatment applications.