A device through which a liquid is passed for purification, filtering or separation from solid matter; anything (including a screen or a cloth) used to strain a liquid; any device functioning as a sieve or filter - in special, a perforated screen or openwork (usually at the end of a suction pipe of a pump), used to prevent solid bodies from mixing in a liquid stream or flowline.
- The most popular application. From waste and water treatment, boiler feed pumps, condensate service, irrigation and general and intermediate water service.
- Cooling water for furnaces, rolling mills, lubricating oil, fuel oil, etc.
- Separation of solid impurities from liquids. Protection of process equipment.