On filter Board for, most primary of that is for contact and sealed, so regardless of is which species automatic pressure filter machine of filter Board, in automatic pressure filter machine of position will has must of blind spot, this blind spot is to let automatic pressure filter machine of filter Board and filter cloth Center has must of space, this space is to can let filtrate through filter cake and filter Board Center of space convergence up, eventually was row out. And center of each plate will have a small hole, after this small hole in the filter plate into completely coincidence, coincidence would later form a channel, this channel effect of slurry can smoothly enter the filtering Chamber which is to let each of the filter cavity flow in the filter cavity filter cloth of solid-liquid separation. And the handle of the filter plate is basically the same, their function is to filter plates for each connection and fixing plate position in the filter room.