Van filter filter filter section is arranged in a certain order by the main beam of the filter plate, sandwiched between the cloth filter plates, membrane filter plate composition, alternating with the filter plate, cloth and membrane filter plate formed a number of independent filter chamber filtration unit ── start filtering the slurry under the impetus of the feed pump, the inlet of the thrust plate into the interior of each filter, and by the feed pressure generated by the pump filtration. Because of the role of the filter cloth, the solid left in the filter chamber to form a filter cake, and the filtrate from faucets (free flow) or the valve (undercurrent) discharge (Tap specifications, see Table I). For washing the filter cake was washed with port thrust plate may be passed through the washing water, washing the cake; the cake if necessary low moisture content, the same can pass into the air from the wash port, through the cake layer, to take away some of the water in the filter cake (for Uk models).