SELF-CLEANING PRESSURE FILTER Russian patent published in 2002 - IPC

FIELD: water treatment. SUBSTANCE: proposed self-cleaning pressure filter has vertical cylindrical housing, feed and outlet branch pipes, grainy charge, drain system made in form of central tubule slotted drainage and peripheral tubular slotted drainage laid in spiral along inner side surface of housing, and distributors installed with possibility of coordinated inphase rotation and by-section change-over of ends of peripheral drainage tubes. EFFECT: increased dirt collecting capacity of filter charge with simultaneously reduced material usage and improved quality of cleaning. 2 cl, 2 dwg