METHOD OF MANUFACTURE OF BULKY FILTER ELEMENT Russian patent published in 1999 - IPC

FIELD: purification of hydrocarbon liquids; applicable in chemical, petroleum refining, automobile and other industries. SUBSTANCE: blanks of filtering disks from flexible porous filtering material are made in form of spheres with central opening and fitted on internal perforated tube, and pressed in axial direction by covers. Spherical shape of blanks after pressing them by covers ensures exponential reduction of pore size in direction of flow of filtered liquid corresponding to exponential law of distribution of impurity particles size, due to which impurities are uniformly distributed inside entire volume of pores of filtering material. EFFECT: increased impurity capacity of filter and its service life. 2 dwg, 1 tbl