SELF-CLEANING CARTRIDGE FILTER Russian patent published in 1997 - IPC

FIELD: filtering. SUBSTANCE: filter has cylindrical housing with liquid inlet and outlet connections, cartridge-type filtering element with perforated inner tube, outer tube provided with rows of uniformly spaced ports at its end faces and filtering material placed between tubes, chamber for liquid to be cleaned formed by housing and filtering element, concentrate chamber formed by housing and outer tube of filtering element hermetically separated from chamber of liquid to be cleaned. One row of ports of outer tube of filtering element is located in chamber of liquid to be cleaned, and other row of ports, in concentrate chamber. Housing is made in form of two hermetically connected cups. EFFECT: increased service life and capacity of filter, reduced service and production expenses. 2 dwg