Recessed Plate – Open Filtrate:

An open filtrate recess plate discharges filtrate to either a “bib” located on one side of the plate or via vertical holes along the underside of the filter plate. Visible filtrate discharge from each chamber can identify holed filter cloth or retention problems.

Recessed Plate – Closed Filtrate:

This is virtually identical to the open filtrate design, but with the addition of corner pads. Holes in these corners form a pipe or tube and collect the filtrate, which is discharged to a manifold at the feed end of the filter press. Spigots may be used to examine the filtrate externally.

Recessed Filter Plate–Caulked and Gasketed (CGR):

Filter cloth is installed in grooves within the plate. Grooves containing ‘O’ ring around the sealing edge and filtrate holes form a tight seal when the plate pack is closed.

Cloth support patterns come in 3 distinct drainage patterns: pipped, elongated pip, and grooved. Grooved drainage is more common on plate & frame installations. The higher filtration pressures used with recessed or membrane plates make a pipped design more desirable. This design provides better support for filter cloth, allowing filtrate to discharge along the base of the recessed filter plate with the least resistance.