Overband magnet systems
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| The most important application for overband magnet systems is ferrous metal separation from materials on conveyor belts. To do this, they are installed over the conveyor belt. The magnetic system lifts the ferrous particles from the material flow passing underneath and then drops them into a collection bin when they leave the magnetic field. The working surface of the magnets is protected by a stainless steel plate which absorbs any wear. This type of ferrous separation system is often used in industry to prevent ferrous particles damaging production machines such as shredders.A growing application area is the recycling industry often in combination with Eddy Current non-ferrous metal separators. Overbelt magnet systems are supplied in two main types, one using permanent magnets and the other electromagnets. <b>Permanent overband magnet systems</b>This type of ferrous separation system is equipped with a powerful permanent magnet.<br />The standard drive for the overbelt magnet system (up to and including the 320 series) is a drum motor. On the 400 and 500 series, the standard drive is by means of a shaft-mounted reduction motor. If required, the belt on the 220 series can also be equipped with the same sort of motor (add "/21" to the article number).The overbelt systems are equipped with a belt tensioner and because of the concave shape of the drums, the belt is self centring. The belt is made from synthetic rubber with vulcanised idlers. The electrical connections conform to standard IP 54 or, if required, IP 65 and the standard power supply required is 3 x 380 V 50 Hz.<br />Systems are available for other voltages if necessary. Some types can be supplied in a 'stretch' version. In these, a transport pole is added as a continuation of the main pole. This transport pole produces a change in the magnetic field which causes the ferrous particles on the belt to move so that any non-ferrous particles which had been hold by the iron particles can drop back into the material flow. This means there are fewer impurities in the ferrous collection.The 'stretch' versions can only be installed with the belt running in the same direction as the conveyor belt. In the 400 and 500 series, the rubber conveyor belt has a wear-resistant layer (Correx blue 45° shore) between the idlers. |  | Overband magnet systems |
| Alongside the permanent magnet types, the range also includes electromagnetic overband<br />systems. The coils of the powerful inbuilt electromagnet are wound with aluminium tape which gives them excellent thermal properties.They meet insulation class H. Oil cooled and/or explosion-safe models can be supplied on special order. The standard of protection for the air-cooled versions is IP 54, for the oil-cooled versions IP 65, and for the explosion-safe version IP 69.The belt used in the systems is manufactured from synthetic rubber with vulcanised idlers. Because of the convex drums, the belt is selfcentring.<br />The drive is by a shaft-mounted reduction motor or a separate motor with a V-belt drive. The electrical<br />power supply is converted from the mains (3 x 380 V 50 Hz) by a transformer/rectifier and conforms to the<br />IP 55 standard. |  | Electromagnetic overband systems |
