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What is a Filter Press?

Filter press is a process most often used for the separation of solids from liquids in which they are suspended. The aim of the operation is the recovery of filtered liquid and solid in form of cake or sometimes both.
Many processes in the food, chemical or pharmaceutical industries make products from liquid-solid suspensions or slurries. These mixtures are a little like a runny mud or milk-shake. The solids in them do not dissolve in the liquid but are carried along in it. Filter presses separate the solids from the liquids so that the useful part can be processed, packaged or delivered to the next step.
Filter presses generally work in a “batch” manner.


Filter presses in principal are pressure filters, wherein a pack comprising of a series of plates and frames (Polypropylene, Cast Iron or Aluminum) or chamber plates (1) (Recessed plates) is compressed between a fixed head (4) on one end and one movable bulk head (3) on the other end, that the movable bulk head is contacted to a hydraulic jack (8).
Filter pack is supported on two parallel tie bars (2)

which are stretched between the fixed end (4) and the free end (3).

The filter press also consists of a skeleton to support the filter plates and a closure mechanism (7) to provide the necessary force on the sealing faces of the plates to counteract the applied force of filtration.

Filter presses are loaded with slurry before completing a filtering cycle and producing a batch of solid filtered material, called the filter “cake” (5). The solid is removed, the press re-loaded with slurry and the filtering cycle repeated. A filter press uses increased pressure to maximize the rate of filtration and produce a final filter cake with a low water content.

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  • Waste water and water treatment industry
  • Chemistry
  • Pharmaceuticals
  • Mineral mining industry
  • Petrochemical
  • Leather industry
  • Ceramic and China industry
  • Marble industry
  • Food industry
  • Textile industry
  • Paper industry
  • Metal processing industry


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