Permanent magnet overband (OVAP)

OVAP permanent magnet overband

In brief

• The permanent magnet overband (OVAP) is a magnetic separator installed above a belt conveyor to extract ferrous items from a material flow.

• It is used in recycling, mining, food processing and waste treatment.

• It operates without electrical power consumption, using ferrite or neodymium magnets, and is generally suspended 200 to 400 mm above the conveyor.

• Applications

• Operating principles

• Operating recommendations

• General characteristics

• Case studies

Applications

Permanent magnet overband (OVAP): a reliable and durable magnetic separation solution

The permanent magnet overband (OVAP) is a magnetic separator used in many industrial sectors for separation and plant protection. Installed above a conveyor, this unit efficiently separates the ferrous items present in a material flow.

• Recycling: extraction of ferrous metals (steel, iron) from waste, wood, glass or bulk materials, improving processing quality and recovery.

• Mining industry: removal of ferromagnetic contaminants during mining operations, protecting machinery and optimising line performance.

• Food processing and waste treatment: equipment protection, product safety and improved end-product quality.

To find out more about choosing the right magnetic separator for your application, see our dedicated article on overband magnets.

Operating principles

How the Lenoir-Mec permanent magnet overband works:

The permanent overband is installed above a belt conveyor carrying bulk materials.

• The magnets generate a magnetic field capable of attracting the ferromagnetic items present in the flow.
• The captured metal contaminants are discharged by a conveyor belt, which deposits them into a separate receptacle.
• Separation is continuous, with no interruption of operation, ensuring high performance without electrical power consumption.
• The Lenoir-Mec permanent magnet overband operates with a powerful magnetic field generated by ferrite or neodymium permanent magnets:

This self-contained system ensures reliable operation, even in harsh industrial conditions.

Operating recommendations

Optimising the efficiency of a permanent magnet overband:

• Positioning: the overband must be installed at the appropriate height above the conveyor (generally between 200 and 400 mm, depending on the model’s strength and the product layer)
• Orientation: in-line mounting (recommended at the conveyor discharge point) or cross-belt mounting, depending on the conveyor configuration.
• Periodic inspection: recommended despite the self-cleaning system, to maintain long-term performance.
• Conveyor speed: from 0.5 to 3 m/s for maximum efficiency.

These technical data are specified in each product data sheet.

General characteristics

Permanent magnet overbands stand out through several key characteristics:

• No energy consumption: permanent magnets (ferrite or neodymium).
• Flexible mounting: cross-belt or in-line mounting.
• Low maintenance: integrated self-cleaning system.
• High performance: extraction up to 400 mm working distance.
• Durable solution: ideal for heavy-duty industrial environments
• Complete range: also available as an electromagnetic version (OV).

These characteristics make the overband magnet an essential solution for demanding industrial environments, in France and internationally.

Advantages

• Energy savings
• Easy integration on existing conveyors
• Continuous 24/7 operation

Services

• Industrial commissioning assistance
• Spare parts stock
• Rapid after-sales service response
• Installed base monitoring and periodic performance checks

Frequently asked questions

What is the OVAP overband used for?

The OVAP is a magnetic separator installed above a conveyor to extract ferrous items from a material flow. It is used in recycling, mining, food processing and waste treatment.

How does the OVAP work?

Permanent magnets generate a magnetic field that attracts ferrous items from the flow. A conveyor belt discharges them into a separate receptacle, continuously and without electrical power consumption for separation.

Which magnets does the OVAP use?

It uses ferrite or neodymium permanent magnets. This self-contained system remains reliable in harsh industrial conditions.

At what height and speed should the OVAP be installed?

The height above the conveyor generally ranges from 200 to 400 mm, depending on the model’s strength and the product layer. The recommended conveyor speed is 0.5 to 3 m/s for maximum efficiency.

Does the OVAP require a lot of maintenance?

No, its integrated self-cleaning system keeps maintenance to a minimum. Periodic inspection is still recommended to maintain long-term performance.

Technical data

Feature	Value
Positioning	the overband must be installed at the appropriate height above the conveyor (generally between 200 and 400 mm, depending on the model's strength and the product layer)
Conveyor speed	from 0.5 to 3 m/s for maximum efficiency.
High performance	extraction up to 400 mm working distance.

Group X=250mm (pole plate A=560, 1,1kW, C=800,D=1063,F=1450,G=650,H=1240,ØI=240,J=250)

Model	In-line mounting	Cross-belt width	Plate B	Weight
OVAP 400/20	650	400	460	360
OVAP 500/20	650	500	560	500
OVAP 650/20	650	650	710	550
OVAP 800/20	650	800	860	600
OVAP 1000/20	650	1000	1060	660
OVAP 1200/20	650	1200	1260	750
OVAP 1400/20	650	1400	1460	830
OVAP 1600/20	650	1600	1660	900

Group X=300mm (pole plate A=760, 1,1kW, C=1000, D=1264, ØI=321, J=320)

Model	In-line mounting	Cross-belt width	Plate B	Weight
OVAP 400/25	800	400	460	615
OVAP 500/25	800	500	560	800
OVAP 650/25	800	650	710	860
OVAP 800/25	800	800	860	1200
OVAP 1000/25	800	1000	1060	1260
OVAP 1200/25	800	1200	1260	1400
OVAP 1400/25	800	1400	1460	1570
OVAP 1600/25	800	1600	1660	1800

Group X=350mm (pole plate A=910, 1,5kW, C=1200, D=1478, ØI=321, J=320)

Model	In-line mounting	Cross-belt width	Plate B	Weight
OVAP 400/30	1000	400	460	740
OVAP 500/30	1000	500	560	870
OVAP 650/30	1000	650	710	1100
OVAP 800/30	1000	800	860	1260
OVAP 1000/30	1000	1000	1060	1550
OVAP 1200/30	1000	1200	1260	1750
OVAP 1400/30	1000	1400	1460	2100
OVAP 1600/30	1000	1600	1660	2300

Group X=400mm (pole plate A=1160, 2,2kW, C=1450, D=1734, ØI=406, J=378)

Model	In-line mounting	Cross-belt width	Plate B	Weight
OVAP 500/35	1200	500	560	1310
OVAP 650/35	1200	650	710	1550
OVAP 800/35	1200	800	860	1950
OVAP 1000/35	1200	1000	1060	2300
OVAP 1200/35	1200	1200	1260	2600
OVAP 1400/35	1200	1400	1460	3000
OVAP 1600/35	1200	1600	1660	3330
OVAP 1800/35	1200	1800	1860	3520
OVAP 2000/35	1200	2000	2060	3850