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ADVANTAGES OF THE OVERBAND MAGNET DND-AC

  • Automatic cleaning without the interruption of the material flow
  • Suspension height up to 500 mm
  • Separation of magnetic particles from 0,5 mm
  • The separator can be positioned across or parallel to the conveyor
  • 10-year warranty
  • All-stainless steel design
  • No dead spots between the magnetic core and separator cover
  • Weight from 440 kg - easy installation
  • Magnetic flux density of 1010 G (at the distance of 200 mm from separator belt)
  • Ferrite as well as light neodymium variants

Permanent overband magnetic separators DND-AC

Overband magnetic separator with automatic cleaning DND-AC

Overband magnet with automatic cleaning is used to separate ferrous metal contamination from bulk materials transported on a belt conveyor. It is ideal for materials heavily contaminated with ferrous particles. Thanks to the automatic cleaning, the separator operation is completely operator-free.

We fit the permanent overbands with either ferrite or very strong neodymium magnets.

For the applications where a light separator of small dimensions is required, (e. g., on mobile crushers or screeners) we can provide an overband magnet weighing only 440 kg!

For heavy industries we recommend that overbands with a magnetic induction of 1010 G (measured at the distance of 200 mm from the separator belt) are used. These very powerful overbands can be suspended 500 mm above the conveyor and separate ferrous particles from the conveyor at a speed of 3 m/s!

We know very well that different applications require different solutions. The strongest or smallest magnetic separator is not always required, the price of the product must also be taken into account. That is why we produce our overband magnets in 10 model series allowing us to provide our clients with the optimum solutions for their individual needs.

7 + 1 reasons for choosing our overband magnet

  • 110-year warranty - we stand behind the quality of our magnetic separators and that is why we provide a 10-year warranty!
  • 212 model series – we have a solution for every application. The basic product lines differ in the magnets that were used in their production (8 model lines are equipped with ferrite and 4 models with strong neodymium magnets). Our standard products are suitable for conveyors 500 - 2000 mm wide.
  • 3Magnetic induction of 1 010 G – our strongest overbands generate a magnetic induction of up to 1010 G (at a distance of 200 mm from the separator belt)! They can be suspended at a height of 500 mm (= reachout) above the belt conveyor and separate ferrous metals sized from 0,5 to 300 mm at a speed of 3 m/s.
  • 4Small compact dimensions - the small dimensions allow for an easy installation even in places with difficult access.
  • 5Weight from 440 kg - our overband magnets can also be used on mobile crushers or in plants where the low weight and small dimensions are a must.
  • 6All-stainless design - the overbands are made of stainless steel, guaranteeing high resistance and a long service life even in demanding conditions.
  • 7No dead spots – the separators are designed in such a way that there are no dead spots between the magnetic core and the separator cover. That is why ferromagnetic particles cannot get under the separator belt and damage it.
  • 8Customized production of separators - do you have any special requirements for dimensions, weight, performance or design of a magnetic separator? We will be pleased to produce a custom-made overband magnet for you that will meet all your needs. We have our design department and production line in the Czech Republic. We have long experience with the production of custom-made separators!

Záruka 10 let / 10 year warrantySOLLAU 10 year warranty

We can vouch for the quality of our magnetic separators and that is why why we provide a 10 year warranty on them! Our magnetic separators can be relied on! We are a specialist in the field of magnetic separation.

Benefits of using our separator

  • Final product without iron contamination
  • Protection of processing equipment (crushers, presses, screw conveyors, etc.) from damage by ferromagnetic objects (broken-off machine parts, screws, nuts, wires, etc.)
  • Separation of ferrous particles
  • Automatic cleaning - no operator required

Installation of an overhead magnet

Installation of an overhead magnetMost commonly the crossbelt magnetic separators DND-AC is suspended above and across the belt, however it is also possible to place the overbelt magnetic separator 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 overbelt magnet 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.

Measuring magnetic separator power

We take pride in thorough testing each overband and measuring its magnetic performance. We know that it is important for our customers to know the magnet performance at different distances from the magnetic separator. That is why we do not state the magnetic induction values only at the magnetic core, but also at a distance of 0 to 400 mm (measured in 50 mm increments) from the separator belt.

We measure the magnetic flux density in such a way that it corresponds as faithfully as possible to real conditions. Therefore, we do not measure the magnetic induction only at the magnetic core (as some manufacturers do and artificially increase the value of the magnetic induction in this way). We measure the magnetic flux density at the above mentioned distances from the separator belt. Such piece of information is important to the customer.

The practically measured values of the magnetic induction are stated at the corresponding overbands in the website section “Gauss charts”.

Of course, we provide a test report with measured magnetic induction values for each separator.

Practical magnetic separator testing

Practical testing DND-AC Nm 5The measured value of the magnetic induction is clear information, but for many customers, it is more important to know the kind of ferrous objects our separator can really separate. That is why we performed a set of tests to better demonstrate the strength and functionality of our overbands. We selected 13 typical ferromagnetic pieces that our customers most often need to separate (nuts, nails, wires, steel balls, etc.) and measured how the distance between the overband magnet and the ferrous objects affects the magnetic attraction (i. e., how far from the separator belt the test pieces can be trapped). 

See the website section “Practical testing” for this piece of information - we are sure that it will provide our client with all the data needed for the selection of the right overband magnet.

Of course, our specialists are ready to help you choose the appropriate type of the magnetic separator.


Connection of a magnetic plate and magnetic rollRecommendation: Connection of a magnetic plate and magnetic roll

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).

Certificate TESYDOSOLLAU – our products are welded by real professionals!

SOLLAU certifications:  
Authorization to perform welding on pressure equipment according to PED 2014 / 68 / EU
Pressure welder certificate according to EN-ISO 3834 - 2, EN 1090 - 2, EN 13480 - 1 to 5, EN 13445 - 1 to 5

Ferrite overbands - transversal placement

The main benefits of ferrite overband magnets include the following: high temperature resistence, long-term magnetic stability, affordable price, deep and very strong magnetic field (in case of stronger models). This separator is designed to be installed across the conveyor.

Ferrite overbands - transversal placement

DND-AC M F
PANTHER

Conveyor magnetic separator with automatic cleaning DND-AC M F PANTHER

  • Suspension height up to 280 mm
  • The lightest of the ferrite models
  • Separation of magnetic particles from 1 mm

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.

ProductMaximum width of conveyor belt (mm)Maximum recommended installation height (mm)Datasheet
crosswise
DND-AC M1 F PANTHER 500 200 display PDF
DND-AC M2 F PANTHER 800 250 display PDF
DND-AC M3 F PANTHER 1000 280 display PDF
DND-AC M4 F PANTHER 1200 280 display PDF
DND-AC M5 F PANTHER 1400 280 display PDF
DND-AC M6 F PANTHER 1600 280 display PDF
DND-AC M7 F PANTHER 1800 280 display PDF

DND-AC Ms F
JAGUAR

Conveyor magnetic separator with automatic cleaning DND-AC Ms F JAGUAR

  • Suspension height up to 320 mm
  • Separation of magnetic particles from 1 mm

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).

ProductMaximum width of conveyor belt (mm)Maximum recommended installation height (mm)Datasheet
crosswise
DND-AC Ms2 F JAGUAR 800 270 display PDF
DND-AC Ms3 F JAGUAR 1000 300 display PDF
DND-AC Ms4 F JAGUAR 1200 320 display PDF
DND-AC Ms5 F JAGUAR 1400 320 display PDF
DND-AC Ms6 F JAGUAR 1600 320 display PDF
DND-AC Ms7 F JAGUAR 1800 320 display PDF
DND-AC Ms8 F JAGUAR 2000 320 display PDF

DND-AC Mp F
LION

Conveyor magnetic separator with automatic cleaning DND-AC Mp F LION

  • Suspension height up to 340 mm
  • Separation of magnetic particles from 1 mm

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

ProductMaximum width of conveyor belt (mm)Maximum recommended installation height (mm)Datasheet
crosswise
DND-AC Mp2 F LION 800 290 display PDF
DND-AC Mp3 F LION 1000 320 display PDF
DND-AC Mp4 F LION 1200 340 display PDF
DND-AC Mp5 F LION 1400 340 display PDF
DND-AC Mp6 F LION 1600 340 display PDF
DND-AC Mp7 F LION 1800 340 display PDF
DND-AC Mp8 F LION 2000 340 display PDF

DND-AC Mm F
TIGER

Conveyor magnetic separator with automatic cleaning DND-AC Mm F TIGER

  • Suspension height up to 400 mm
  • Separation of magnetic particles from 1 mm

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

ProductMaximum width of conveyor belt (mm)Maximum recommended installation height (mm)Datasheet
crosswise
DND-AC Mm2 F TIGER 800 320 display PDF
DND-AC Mm3 F TIGER 1000 350 display PDF
DND-AC Mm4 F TIGER 1200 400 display PDF
DND-AC Mm5 F TIGER 1400 400 display PDF
DND-AC Mm6 F TIGER 1600 400 display PDF
DND-AC Mm7 F TIGER 1800 400 display PDF
DND-AC Mm8 F TIGER 2000 400 display PDF

DND-AC Mx F
BEAST

Conveyor magnetic separator with automatic cleaning DND-AC Mx F BEAST

  • Suspension height up to 500 mm
  • Separation of magnetic particles from 1 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!).

Model*Maximum width of conveyor belt (mm)Maximum recommended installation height (mm)Datasheet
crosswise
DND-AC Mx3 F BEAST 1000 500 display PDF
DND-AC Mx4 F BEAST 1200 500 display PDF
DND-AC Mx5 F BEAST 1400 500 display PDF
DND-AC Mx6 F BEAST 1600 500 display PDF
DND-AC Mx7 F BEAST 1800 500 display PDF
DND-AC Mx8 F BEAST 2000 500 display PDF

DND-AC Ms F
EKO

Conveyor magnetic separator with automatic cleaning DND-AC Ms F EKO

  • Budget version (attractive price/performance ratio)
  • Magnetically as strong as the branded overband DND-AC Ms F JAGUAR
  • Suspension height up to 320 mm
  • Separation of magnetic particles from 1 mm

Overband magnetic separator DND-AC EKO is a low-cost variant of an overband magnet. From the magnetic point of view there is no difference between the standard version DND-AC and the economic version DND-AC EKO.

Both generate the same magnetic induction (what is quite exceptional, as the economic models of our competitors are generally magnetically weaker in comparison with their standard models). On the other hand, the clients acquiring our DND-AC EKO version have to accept the fact that this model is equipped with the engine CANTONI and with the gearbox VARVEL, there are unprotected bearings and only the bottom part of the separator is protected by metal sheets.

DND-AC EKO is designed to handle product stream with a high content of ferromagnetic particles (exceeding the capacities of the manually cleaned magnetic plates). This separator can 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.

ModelRecommended for a belt with a maximum width (mm)Maximum recommended installation height (mm)Datasheet
crosswise
DND-AC Ms2 F EKO 800 270 display PDF
DND-AC Ms3 F EKO 1000 300 display PDF
DND-AC Ms4 F EKO 1200 320 display PDF
DND-AC Ms5 F EKO 1400 320 display PDF
DND-AC Ms6 F EKO 1600 320 display PDF
DND-AC Ms7 F EKO 1800 320 display PDF
DND-AC Ms8 F EKO 2000 320 display PDF


Magnetic separators in store

Some products from this model family are available for immediate purchase. We are constantly extending the offer of our magnetic separators in stock so that we can deliver them to you immediately. Please, contact our dealer to inform for their current availability.

Neodymium overbands - transversal placement

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). This separator is designed to be installed across the conveyor.

Neodymium overbands - transversal placement

DND-AC N
JACKAL

Conveyor magnetic separator with automatic cleaning DND-AC N JACKAL

  • Suspension height up to 200 mm
  • Separation of magnetic particles from 0,5 mm

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).

ProductMaximum width of conveyor belt (mm)
At crosswise installation above the conveyor
Maximum recommended installation height (mm)Datasheet
DND-AC N1 JACKAL 500 200 display PDF
DND-AC N2 JACKAL 700 200 display PDF
DND-AC N3 JACKAL 1000 200 display PDF
DND-AC N4 JACKAL 1200 200 display PDF
DND-AC N5 JACKAL 1400 200 display PDF
DND-AC N6 JACKAL 1600 200 display PDF
DND-AC N7 JACKAL 1800 200 display PDF

DND-AC NKS 1
JACKAL II

Conveyor magnetic separator with automatic cleaning DND-AC NKS 1 JACKAL II

  • Separator constantly in stock (immediately available)
  • Twin pole neodymium variant with a ferrite releasing pole
  • Suspension height up to 170 mm
  • Separation of magnetic particles from 0,5 mm

Is available in 2-pole version with discharge ferrite pole.

ProductMaximum width of conveyor strand (mm)
At crosswise installation above the conveyor
Maximum recommended installation height (mm)Datasheet
DND-AC NKS1 JACKAL II 900 170 display PDF


Magnetic separators in store

Some products from this model family are available for immediate purchase. We are constantly extending the offer of our magnetic separators in stock so that we can deliver them to you immediately. Please, contact our dealer to inform for their current availability.

DND-AC Ns
HYENA

Conveyor magnetic separator with automatic cleaning DND-AC Ns HYENA

  • Suspension height up to 220 mm
  • Separation of magnetic particles from 0,5 mm

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.

ProductMaximum width of conveyor belt (mm)
At crosswise installation above the conveyor
Maximum recommended installation height (mm)Datasheet
DND-AC Ns1 HYENA 500 220 display PDF
DND-AC Ns2 HYENA 700 220 display PDF
DND-AC Ns3 HYENA 1000 220 display PDF
DND-AC Ns4 HYENA 1200 220 display PDF
DND-AC Ns5 HYENA 1400 220 display PDF
DND-AC Ns6 HYENA 1600 220 display PDF
DND-AC Ns7 HYENA 1800 220 display PDF


Magnetic separators in store

Some products from this model family are available for immediate purchase. We are constantly extending the offer of our magnetic separators in stock so that we can deliver them to you immediately. Please, contact our dealer to inform for their current availability.

DND-AC Nm
WOLF

Conveyor magnetic separator with automatic cleaning DND-AC Nm WOLF

  • Suspension height up to 250 mm
  • Separation of magnetic particles from 0,5 mm

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.

ProductMaximum width of conveyor belt (mm)
At crosswise installation above the conveyor
Maximum recommended installation height (mm)

Datasheet
DND-AC Nm2 WOLF 700 250 display PDF
DND-AC Nm3 WOLF 1000 250 display PDF
DND-AC Nm4 WOLF 1200 250 display PDF
DND-AC Nm5 WOLF 1400 250 display PDF
DND-AC Nm6 WOLF 1600 250 display PDF
DND-AC Nm7 WOLF 1800 250 display PDF


Magnetic separators in store

Some products from this model family are available for immediate purchase. We are constantly extending the offer of our magnetic separators in stock so that we can deliver them to you immediately. Please, contact our dealer to inform for their current availability.

Ferrite plates - longitudinal placement

The main benefits of ferrite overband magnets include the following: high temperature resistence, long-term magnetic stability, affordable price, deep and very strong magnetic field (in case of stronger models).

This separator is designed to be installed longitudinally with the conveyor. Thanks to the installation above the end of the conveyor belt, the material is separated as soon as it falls from the end conveyor roller and is thus more permeable. This has a positive impact on the quality of the magnetic separation. Sometimes it can be the only suitable solution of magnetic separation, e.g. for materials with poor bulk properties or when the layer of material transported by the conveyor is high.

We recommend replacing the end conveyor roller with a non-magnetic one to increase the efficiency of the magnetic separator and prevent unwanted magnetization of the conveyor roller.

Ferrite plates - longitudinal placement

DND-AC Ms F IN
LYNX

Magnetická deska s automatickým čištěním DND-AC Ms F LYNX

  • Suspension height up to 320 mm
  • Separation of magnetic particles from 1,5 mm

This range of magnetic plates is designed for the separation of material with a medium layer height - the hanging height is 320 mm.

ProductMaximum width of conveyor belt (mm)Maximum recommended installation height (mm)Datasheet
longwise
DND-AC Ms2 F IN LYNX 800 320 display PDF
DND-AC Ms3 F IN LYNX 1000 320 display PDF
DND-AC Ms4 F IN LYNX 1200 320 display PDF
DND-AC Ms5 F IN LYNX 1400 320 display PDF
DND-AC Ms6 F IN LYNX 1600 320 display PDF

DND-AC Mx F IN
PUMA

Magnetická deska s automatickým čištěním DND-AC Mx F PUMA

  • Suspension height up to 450 mm
  • Separation of magnetic particles from 1,5 mm

This is the most powerful model series of separators for longitudinal placement with a hanging height of an incredible 450 mm!

This range of magnetic plates is designed for the separation of material with a large layer height.

ProductMaximum width of conveyor belt (mm)Maximum recommended installation height (mm)Datasheet
longwise
DND-AC Mx4 F IN PUMA 1200 450 display PDF
DND-AC Mx5 F IN PUMA 1400 450 display PDF
DND-AC Mx6 F IN PUMA 1600 450 display PDF



Which industrial branches can the overband magnets be used in?

This self-cleaning magnetic separator finds use in recycling, mining, plastic, glass and wood industries.

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