Overband magnetic separator DND-AC

Overband magnetic separator / Conveyor magnetic separator with automatic cleaning

Sollau_Overband_magnetic_separator_DND-AC (4) - kopie.jpg

Overband magnetic separator DND-AC is designed to handle product stream with a high content of ferromagnetic particles (exceeding the limitation of standard suspended plate magnets).

It is designed to capture in a quick and easy way valuable ferromagnetic particles from a product stream and at the same time the overband magnetic plate with automatic cleaning protects your machinery (shredders, mills, grinders, screw conveyors etc.) that subsequently treat the material. The tramp ferrous metal extracted from the conveyor is removed by a heavy duty rubber belt into a skip or a collection bin at the side of the conveyor.


Most commonly the overband magnetic separator DND-AC is suspended above and across the belt, however it is also possible to place it at the head of the conveyor (parallel to the belt). The kind of applied magnets depends on the position of the separator: if the magnetic separator is parallel to the conveyor belt, it is possible to use weaker magnets (as at the end of the conveyor belt the material is quite loose). On the contrary, if the magnetic separator is suspended across the belt, we recommend that stronger magnets are applied (as the material layer on the belt might be higher and compacter)

The standard version of the overband magnetic separator DND-AC M is fitted with strong permanent ferrite magnets. However, if you need stronger magnetic force (e. g. for mobile lines, grinders, mills), we recommend that the overband magnetic separator is equipped with extremely powerful neodymium NdFeB magnets from rare earth ores. A careful interference shielding ensures that the magnetic field is concentrated only on the material on the conveyor belt.


In order to achieve the highest possible degree of separation, it is recommended that – especially in case of a higher layer of material on the conveyor belt – the overband magnet DND is combined with the magnetic pulley MV (that is able to attract ferromagnetic particles from lower material layers).

In total there are eight types of DND-AC self-cleaning overband magnets (five ferrite and three neodymium ones, see below), so that even standard products can satisfy the needs and requirements of the broadest possible spectrum of clients. At the same time, our customers can be sure that the parameters of the product are in accordance with their needs and that they will not pay extra money for an above standard equipment that would be unnecessary for their specific application.

DND-AC model range

Ferrite ovebands

Sollau_Overband_magnetic_separator_DND-AC (4).jpg

The main benefits of ferrite overband magnets include the following:

  • high temperature resistance
  • long-term magnetic stability
  • affordable price
  • deep and very strong magnetic field (in case of stronger models)


combines a standard performance with an interesting price. These separators are intended for medium-duty applications with the maximum installation height of 200 mm, and they are capable of trapping larger ferromagnetic particles (above 1 mm). A very good rate of return (price/performance ratio) is a significant benefit of this kind of plate.


is intended for heavy-duty users who expect from the separator a high performance even at greater depths (the maximum installation height is 320 mm).


is a model intended for the installation height up to 340 mm (it is also wider, what is its another advantage).


is designated for very demanding applications and for removal of ferromagnetic particles from depths of up to 400 mm.


is the strongest of all SOLLAU magnetic overband separators. Magnetic induction of these devices is at the limit of the capabilities of the strongest permanent magnets and can only be surpassed by electromagnetic separators. This series is intended for the most challenging separation from extreme depths and high and heavy material layers. The maximum suspension height of these devices is 450 mm (an interesting fact: the strongest ferrite DND-AC Mx F series is approximately five times heavier than the lightest DND-AC M F series!).

Neodymium overbands

Sollau_Overband_magnetic_separator_ndfeb_nl_vz (3).jpg

An extremely strong (but relatively short) magnetic field and a low weight are the most significant benefits of neodymium overband separators. That is why the application of the neodymium separators is preferred at the places where it would not be possible to use heavy ferrite magnets or where a very high separation efficiency at shallower depths is required (e. g., in cases of mobile crushing and recycling lines).


is the lightest series intended for the maximum suspension height of 200 mm. This separator is even able to trap Fe particles smaller than 1 mm (at shallower depths).


is a stronger neodymium variant (with a maximum installation height of 220 mm), intended for medium-duty applications. Its benefits include: a high magnetic induction (at a short distance),  a separation of smaller Fe particles and a low weight.


This is the strongest neodymium model, particularly intended for mobile applications where an extremely high magnetic induction at shallower material depths is needed. Maximum installation height: 250 mm.

The overband magnetic plate separator finds use in recycling, mining, plastic, glass and wood industries.



Extra value added

Magnetic force (induction) generated by the extremely strong permanent magnets from rare earth ores does not let through any unwanted ferromagnetic impurities – and that is why the application options of our products are nearly unlimited (they find their use in chemical, plastic, automotive, building and pharmaceutical industries, food processing, mining etc.).

Our company goal is not only to manufacture and deliver a product, but above all to find and offer an exact solution satisfying the requirements and needs of just YOUR company. In these days of rapid changes in technology it is very difficult to keep up with the latest trends even in the field of your own activity, not to mention other industrial or foreign branches. And that is why we offer you our technical support based on our know-how and our experience. We hope that you - as well as our present clients - will also appreciate our assistance with solving problems regarding the separation of magnetic particles from your products, that we will help to protect your expensive machinery and that our solutions will make your production process even more fluent. If you are looking for a solution of a problem with separation or detection of ferromagnetic impurities in your goods, do not hesitate to contact us. We can help you.

Free magnet audit

Free magnet audit is an exceptional service thatSollau_serviceman.jpg

  • checks the function of the magnetic separator (if the tramp metal is effectively trapped)
  • examines if the magnetic separator fulfils its potential and meets application requirements
  • evaluates the effective pull, the status, the location and the cleanness of the applied magnets

During the audit, we do not only inspect your magnetic equipment, but we also

  • provide training on care and maintenance of magnetic separators
  • suggest the measures to be taken in order to improve the operating efficiency of the magnetic separation related to your products and materials
  • identify the key areas in your company where the application of magnetic separators could enhance the operating performance, reduce operating costs, purify the product or protect processing equipment from metal damages

Audits are conducted by SOLLAU specialists that - in co-operation with the client - develop an audit plan and determine priorities. During the audit, the auditor physically inspects and measures the effective strength of the magnetic separator. He also photographs and documents the state of the device. After the check is completed, the auditor issues a detailed report including the results of the effective strength findings. The inspection results are also important references for internal quality assurance and help analyse biological, chemical and physical hazards (HAACP) as well as ensure high quality production (QA).


Similar products

Contact us

e-mail info@sollau.cz

Phone +420 576 013 873

SOLLAU s.r.o.
Hrivinuv Ujezd 212
763 07 Velky Orechov
Czech Republic

VAT ID: CZ29261759

Show in Google Maps...

Name and surname:
Phone / Mobile:
Note (Would you like to tell us anything or ask us about anything?):