Reverse Flow Horizontal Plate Filter (RFHPF)
The flow path through the standard HPF is into the vessel until pressure becomes sufficient to drive the filtrate down through the medium, onto the surface of the bottom side of each plate, out through each plate’s center ring, and down through the column created by the set of stacked center rings.
The flow path of the RFHPF is the reverse. Filtrate first flows into the center column via an inlet at the bottom of the filter. From there it flows through holes cut in the center rings onto the topside of the filter plates. It then flows through the medium supported by the top plate, and out through holes punched through the rings that form the OD of the plates, and into the tank. From there it flows out an outlet placed eccentric to the inlet.
A second critical feature of this design is that every part of every plate disassembles, or is welded together from both sides.
Together these two features permit maximum sanitary operation and cleaning. All target filtrate remains within the cartridge, leaving the vessel perfectly clean from one cycle to the next. This means the vessel, itself, requires no cleaning between cycles. The cartridge is designed for clean-ability.
A third difference, but not a feature, between the RFHPF and HPF is that the scavenger plate option is neither available nor an advantage to the RFHPF in the way that it is to the HPF. Since the residual filtrate retained in the cartridge is of significantly less volume than that retained in the tank, there is no significant benefit to forcing it through a scavenger plate.
Otherwise, everything said about the RFHPF applies to the HPF.