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Discfilter

NP Discfilter 19 & 22

The NP Discfilter 19 & 22-series are based on the same modular design as our successful NP Drumfilter series, plus new developments to adapt the disc filter technology for aquaculture criteria. These developments make the NP Discfilter the most optimized disc filter solution on the aquaculture market.

Download our filter brochure.

Drum filter or disc filter?

Discfilter
Discfilter construction

The filter has several filter media discs attached to a drum. Each disc consists of several filter cassettes of a well-proven design that also simplifies maintenance. The filter is rotated by a helical worm gear motor via a lubricant-free chain, running on the peripheral of the centre drum. This feature reduces stress on the drum structure and drive arrangement, leading to lower power consumption and reduced maintenance costs.

The optimized way of filtering water

The NP Discfilter is a mechanical self-cleaning filter for removal of suspended solids, specially designed for aquaculture applications. The inflow (brown arrow) enters the filter drum and is distributed into the disc segments by gravity. The filter media attached to the discs separates the solids from the inflow and allows the filtrate (blue arrows) to pass through. The separated particles are removed with the backwash system and is flushed into the sludge trough (red arrow).

 

All NP Discfilters are by default equipped with oscillating backwash spray header (”Moving Backwash”). This function improves the cleaning and life span of the filter cloth and reduces backwash water consumption by 20%.

 

The filter cloth is normally made from polyester, or stainless steel if required. The filter opening can be chosen from a wide range, normally from 10 to 100μm.
Material: Stainless steel EN 1.4301, EN 1.4404 or EN 1.4462 (Duplex)
The cover is by default made from GRP.

 

19-Series – disc diameter 1900 mm

Available in three different versions:

  • Frame version

  • Frame version with a level tank

  • Tank version

The 19-Series models are available with 4-16 discs.

22-Series – disc diameter 2200 mm

Available in two different versions:

  • Frame version

  • Frame version with a level tank

The 22-Series models are available with 8-20 discs.

Discfilter versions

The tank version is a free-standing filter, whereas the framed version enables installation in concrete channels:

Frame version

Frame version with level tank 

Tank version

Discfilter with prefilter

NP Prefilter

The NP Prefilter can be used in the drum and disc filter installations. Wedge wire surface with frequency regulated scraper and maintenance free composite powertrain.

The NP Prefilter ensures removal of coarse particles. It also acts as a fish barrier, preventing fish from entering the filter system:

 

  • Filters out coarse particles

  • Acts as fish barrier

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