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Noggerath Spiral Sieve NSI-T / NSI/D-T

Fine screening of wastewater in a tank with a perforated or wedgewire screen, including conveyance of screenings, dewatering, compacting and discharge.

Equipment for the fine screening of wastewater in inlet has been part of the standard range of the brand Noggerath of Aqseptence Group since 1988. 
Our compact and robust spiral sieves are ranked among the best machines
of their kind in the world.

Unique Selling Point

  • Fine screening and dewatering in one unit
  • Simple retrofitting, no bed drop required
  • Complete hygienic stainless steel encapsulation
  • High operational reliability: – no blockages or pigtailing – no pressing of screenings through the sieve surface
  • No service water required in the pressing zone


The liquid flows into the sieve basket, which is open on the inlet side. Solids with a larger diameter than the hole / gap width are retained. A continuous layer of solids is thus formed on the surface of the screen, reducing free passage through it and causing the level of the liquid upstream of the screen casing to rise. A level measuring device, installed upstream of the spiral screen, monitors the respective level of the liquid. 

When the preset maximum level is reached or exceeded, the drive of the spiral screen is automatically activated. The deposits of solids retained in the sieve basket are then conveyed by the spiral into the pressing zone and dewatered. A rotating scraper in the discharge area ensures that the dewatered solids are automatically discharged. During the discharge procedure, the sieve basket surface is cleaned by means of a spiral brush mounted on the spiral. As a result of the cleaning and discharging processes, the level of the liquid upstream of the sieve basket drops. When this level reaches or falls below the set level, the spiral drive switches off automatically.

Our spiral sieve solutions are suitable for both indoor and outdoor installation and have proven to be particularly economical in operation. No service water is needed with an installation angle of 35°, for example, and the brush, which divided into two individually exchangeable elements, ensures fast and cost-effective maintenance.


Fine Screening

Aqseptence Group is also renowned for continuous development in the field of fine screening. We aim to ensure a reliable, defined and targeted separation of fine substances such as fibres and floating matter, in order to optimise...


Locations and Contact


Aqseptence Group (India) Private Limited, Ahmedabad

Sales and Manufacturing Location
E-540, GIDC, Sanand-II Industrial Estate,
Village: Bol, Tak: Sanand,
Gujarat 382170, Ahmedabad

Tel: +91 2717 618000



Aqseptence Group FZCO, Dubai

Sales Location
East Side 5EA, 7th floor, 722
P.O. Box 371082
Dubai Airport Free Zone
United Arab Emirates
United Arab Emirates

Tel: +971 42278456



Aqseptence Group Carpi Srl, Limidi

Sales and Manufacturing Location
Via Pitagora 30
41010 Limidi Di Soliera, MO

Tel: +39 059 525720

Fax: +39 059 525443



Aqseptence Group SAS, Availles-en-Chatellerault

Sales and Manufacturing Location
Zone Industrielle
86530 Availles-en-Châtellerault

Tel: +33 5 4902 1600

Fax: +33 5 4902 1616



Aqseptence Group GmbH, Bückeburg

Sales Location
Ziegeleiweg 2
31675 Bückeburg

Tel: +49 5722 882 0

Fax: +49 5722 882 282



Aqseptence Group GmbH, Aarbergen

Sales and Manufacturing Location
Passavant-Geiger-Strasse 1
65326 Aarbergen

Tel: +49 6120 280

Fax: +49 6120 28 2182


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