Outotec Larox® PF-DS Filter

Outotec Larox® PF-DS double-sided pressure filter is a tower press filter where the plate pack is composed of polypropylene membrane filter plates stacked on top of each other. The cake forms between the closed filter plates on the top and bottom part of the filtration area, hence the term double-sided filter. We offer a range of filter sizes for various applications and the filters are designed for easy maintenance and consistent results under varying process conditions. PF-DS meets the challenging process requirements in chemical process industry and due to the flexible operation the filter can be used in various applications. Our comprehensive support services help you select the correct filter model, assist with plant design, and ensure efficient and reliable operation with high quality maintenance.


  • Excellent handling of difficult and slow filtering materials
  • Guaranteed cake discharge even with challenging material
  • Multiple cake washing options lead to excellent washing result
  • Efficient cleaning
  • High corrosion resistance
  • Suitable for food grade applications
  • Fully automatic for consistent results under varying process conditions

Proven Technology for Reliable Operation

Outotec has designed PF-DS using the best features from two different filter types. PF-DS replaces the conventional Outotec Larox DS filter using mainly proven PF filter technology in it. The individual filter plates have double-sided filtration area of 4.7 m2 and an operating pressure of up to 16 bar. The plates are stacked vertically to give a total filtration area of 38–94 m2 .

The continuous filter cloth runs through the whole filter and one side of the filter cloth is utilized for filtration. We can supply a range of different cloth types for different applications. The filter cloth ensures efficient and thorough cake discharge from each individual chamber at every cycle, eliminating the need for manual intervention.