Backflush Filters

The BOKELA Backflush Filter is available with up to 500 m² filtration area.

Process Design

The main components of the BOKELA Backflush Filter are the pressure vessel, the filter elements, a filtrate receiver for backflushing, quick opening/closing pneumatic valves and a process automation. The quasi-continuous operation of the Backflush Filter consists of following cycle steps:

  • vessel filling and pre-filtration
  • clear filtration
  • filtrate backflushing for cake discharge and sludge output


Performance Data

  • high specific throughput of up to 1.4 – 2.0 m³/m²h (depending on the application)
  • low solids content in the filtrate: ≤ 10 mg/l (depending on the application)
  • complete cake discharge thanks to optimised backflushing
  • concentrated solids at the discharge with approx. 150 g/l (depending on the application)
  • short pre-filtration and backflushing, i.e. short dead times
  • high availability


Filter Data

  • filtration area of up to 500 m²
  • compact unit with up to 8 m² filtration area per 1m³ vessel
  • filtration pressure of up to 5 bar, abs
  • fully automated and simple operation
  • hermetically closed and clean operation
  • stable, optimised filtration elements with optimised mechanic and process design
  • quicker and safer solids output thanks to:
    • quick moving pneumatic valves with high reliability
    • angle of output cone adapted to the product (65-75°)
  • long cloth lifetime (depending on the application)
  • small footprint thanks to high specific filtration area

© BOKELA Ingenieurgesellschaft für Mechanische Verfahrenstechnik mbH
Tullastr. 64, D-76131 Karlsruhe
Tel.: +49 721/96456-0, Fax: +49 721/96456-10
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