LIQUID FILTERING APPARATUS Russian patent published in 2000 - IPC

FIELD: liquid filtering equipment. SUBSTANCE: apparatus has casing, perforated supporting tube, liquid supply and liquid discharge branch pipes positioned axially of perforated tube, end flanges, filtrate discharge union mounted on one end flange, tubular grid, and tubular members provided with outer filtering layer and fixed in tubular grid so as to define hydraulic line for discharging filtrate via gap between tubular grid and end flange on which filtrate discharge union is mounted. Tubular members are sealed at other side. Apparatus is provided with member for cleaning outer filtering layer of tubular members. Supporting tube has stopper positioned for sliding within tube. Liquid supply and discharge branch pipes are made threaded and provided with nuts for mounting apparatus on supporting tube. Filtering layer cleaning member is formed as perforated disk positioned in spaced relation to housing. EFFECT: increased efficiency in cleaning liquid and recovery of filtering surface. 4 cl, 4 dwg