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Multilayer Filter Type FNS

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Multilayer Filter Type FNS

In waste water treatment plants multilayer filters are installed downstream as security filter. Filtration of suspended particles takes place in the upper layer consisting of hydroanthracite or silica sand. Backwashing is carried out by manual operation or automatically operated valves.

  • uncomplicated and effective
  • removal of suspended particles
  • high performance
  • space-saving installation and easy to maintain

Decker Mehrschichtfilter FNS
Figure: Decker multi layer filter type FNS

 

Due to its geometry, the corrosion resistant materials and the special filling, the multi-layer filter FNS has a remarkable filtration capacity.

Pressure filter

The pressure filter consists of the vessel with valve system, manometer and sampling-valve. The interior consists of a modern nozzle floor with impact- and corrosion-resistant nozzles made of polystyrene.
The vessel is sandblasted and covered with a corrosion-resistant synthetic material which wont embrittle and which stands out due to very high adhesive power.

Backwashing

Manually operated with hand-valves or automatically controlled by pressure-difference.

Maintenance

Maintenance is limited to regular backwashing which is released by simple adjusting of the operating valves.

Examples of use

Multi-layer filters are mainly used for clarifying and particle-filtration of liquids, f. ex.

  • as downstream filter of waste-water-treatment plants to remove incompletely sedimented metal-hydroxide flocs
  • for pre-filtration for ion-exchange circulation systems
  • for removal of iron and manganese in the field of water-purification.

Decker Mehrschichtfilter FNS technische Zeichnung
Figure: Decker multi layer filter FNS engeneering drawing

 

Decker Mehrschichtfilter FNS Ventilstellungen
Figure: Decker multi layer filter FNS valve positions

Data

 

Unit

FNS 40

FNS 60

FNS 80

FNS 130

Flow rate

m/h

2

3

4

7

Vessel diameter

mm

400

480

650

800

Width incl. valve system

ca. mm

580

660

860

1010

Depth

ca. mm

475

555

730

880

Required ceiling height

ca. mm

2000

2350

2500

2550

Max. operating pressure

Bar

4

4

6

6

Weight incl. filter material

ca. kg

350

670

1000

1600

Amount of water used for backwashing

ca. L

700

1000

1300

2100

 

 

Decker Verfahrenstechnik GmbH
Am Roethenbuehl 7, 92348 Berg/Opf., Germany
Web: http://www.decker-vt.de E-Mail: info@decker-vt.de
Phone: +49 (0)9189/4410-0 Fax: +49 (0)9189/4410-20

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