Filter Press Plate and Frame vs Recessed Filter Press
Plate and Frame Filter Presses are the most basic and oldest type of Filter Press. A metal skeleton holds and locks the filter plates together to build a pressure chamber in the formation. Clamping is accomplished with either an old-fashioned wheel crank or, more recently, a hydraulic pump and cylinder (either manual or automatic). The plates are made of a variety of metals, including cast iron, aluminum, and polymers, the most popular of which is polypro. Before being filtered through the cloth, the slurry is pushed into one or more corner holes and then into each frame. The filtered clean water runs through the solid plate’s drainage system and into one or more corner holes that aren’t used for slurry feed. This clean solution makes its way to the customer’s tanks, drain, or process via discharge pipes. No more slurry can be fed into the filter press once these hollow frames are full with solids, so it’s time to open the press and knock out the solids.