Larox PF-DS double-side pressure filter

Outotec® Larox® PF-DS 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 on the top and bottom side of the filtration chamber, hence the term double-side filter.

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 chamber has double-side 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 depending on the unit size. One endless filter cloth runs through the whole filter and one side of the filter cloth is utilized for filtration. A wide range of different cloth types is available to meet the application needs.

The filter cloth ensures efficient discharge of all cake from each individual chamber at every cycle, eliminating the need for manual intervention.

Consistent performance and simple maintenance

PF-DS Filters are fully automatic, operating either with a stand-alone panel or through a distributed control system. Automation extends beyond basic filter sequencing to full process control, ensuring consistent results under varying process conditions.

The PF-DS filtration process is a batch operation which includes filtration, membrane pressing and air drying stages. Several options for cake washing can be added to the process depending on the needs. When the process cycle is ended, filter cakes will be discharged from the one side of the filter. Due to the cloth on both sides of the chamber together with the cloth scrapers, cake discharge is fully automatic without operator presence.

After each cycle, the moving filter cloth passes through water sprays to remove any embedded solids. This maintains cloth permeability, consistent filter performance and extends cloth life.

The single cloth system makes cloth change simple and quick, typically taking as little as 30 minutes. Furthermore, cloth inspection can be carried out without the need for equipment shutdown.

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.

Please note that the figures below may vary depending on the delivery scope. Contact Outotec for exact figures.

Outotec® Larox® PF-DS series

PP filter plate and PP membrane, 4.7 m2/chamber