Automatic Pressure Filters

Automatic pressure filters resemble filter presses, but with pressure plates stacked vertically instead of horizontally, changing the direction of filtration to the vertical direction. The slurry is fed under pressure into chambers formed by the plates between a rubber diaphragm and a cloth filtering belt. After cake formation, the diaphragm compresses the remaining liquid from the cake prior to cake washing or discharge. The plates, which are stacked tightly, then separate and the belt indexes forward to move the cake to a discharge chute. Automatic pressure filters are constructed of the following main components:

* A frame that supports the plates and the two hydraulic rams that open and close the plates during the filtration cycle.
* The filter cloth that both filters and transports the cake.
* The chambers that are constructed of a recessed upper plate with an attached rubber diaphragm and a discharge roller, and a lower plate with that supports the filtering cloth.
* A pump that inflates the diaphragm to a pressure of 16 bars during the filtering cycle.