Magnetic grids
Magnetic grids belong to the group of magnetic separators for dry mixtures (in some cases also applicable to liquid mixtures) and are the simplest type of separators creating a magnetic field that captures ferromagnetic impurities. Magnetic grids are manufactured in standard size ranges and also custom-made according to customer requirements. They are most commonly used in the food, construction, ceramics, and chemical industries, in porcelain manufacturing, and other industrial areas where dry, well-permeable material in small to fine fractions is processed. They are not suitable for use with abrasive substances or materials with sticky properties.
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Why Magnetic Grids Are Important
Reliable contaminant removal
As materials pass through the grid, magnetic rods capture unwanted metal fragments such as rust particles, iron dust, steel shards or small metal pieces. This prevents contamination and protects downstream machinery.
Low-maintenance and energy-free
Magnetic grids do not require electricity or moving parts. Once installed, they work continuously and quietly, offering long-term protection with minimal maintenance.
Improved product purity
By removing ferrous contaminants early in the process, magnetic grids help ensure that final products meet strict quality and safety standards across various industries.
Cost savings and reduced downtime
Eliminating contaminants at the point of entry helps prevent equipment damage, reduces the frequency of repairs and maintenance, and ensures smoother production flow.
1Check that the material is suitable at all
Magnetic grids are designed for dry, well permeable material in small to fine fractions. They are used in the food and construction industries, in ceramics and porcelain production, in chemicals and in similar operations.
They are not intended for abrasive substances or materials with sticky properties. Abrasive material wears the rod surface, sticky material bridges between the rods and blocks the flow. For those cases a plate separator, a drum or a flow-through unit is the right answer.
2Learn to read the designation
A code such as MR 200x200x50/5 reads as length x width x height in millimetres, followed by the number of magnetic rods. So this is a 200 by 200 mm grid, 50 mm high, with five rods.
The stocked range runs from MR 100x100x50/2 through 150x150x50/3, 175x175x50/3 and 200x200x50/5 up to larger units such as 250x250x50/4, 285x275x50/4 and the rectangular 390x140x50/4.
3More rods means a finer barrier
Two grids of the same outside dimension can differ in rod count, and that spacing decides what gets through. Closer rods capture finer particles but restrict the flow more, wider spacing keeps the throughput up and catches larger fragments.
For fine iron dust and rust in flour, powders or ceramic slips, take the higher rod count. For coarse contamination and high throughput, a lower count keeps the line running.
4Compare induction in gauss
Circular grids in the range state 10,500 Gs in versions 150/3, 200/4 and 250/5, and the strongest designs currently reach up to 14,500 Gs.
Induction is what decides whether a fine particle is pulled out of the stream in the fraction of a second it spends near the rod. Where the product goes to a customer with contamination limits, this figure is worth paying for.
5Match the shape to the opening
The range covers square and circular grids in various sizes and designs. A square grid suits a rectangular chute or a hopper opening, a circular one suits a round pipe outlet or a silo flange.
Accessories matter too: a set of small spreading roofs is available for the MR 175x175x50/3 VVM ECO, which distributes the material across the whole grid instead of letting it fall onto one spot.
6Plan cleaning, and order a custom size if needed
A grid needs no electricity and has no moving parts, so once it is installed it works continuously and quietly. The only routine task is removing the captured iron, and the interval follows from how contaminated the input is.
All separators are machined, which is what gives them a long service life. Besides the standard size ranges, grids are manufactured to customer requirements, so an unusual opening does not rule out a grid.
Tip: Before ordering, take the free cross section of the chute and a sample photo of the material. Those two things tell us the size, the rod count and whether a grid is the right design at all, which is faster than comparing catalogue codes.
Related categories to the Magnetic grids category
- Magnetic separators
- Magnets for hoppers
- Magnetic rods
- Magnetic plates
- Separator with telescopic grates
- Rotational separators
- Plate magnetic separator
- Magnetic drum
- Flow magnetic separators
- Magnetic separation vessel
- Magnetic dust traps
- Magnetic swarf collectors
- JACOB piping systems
- Slide gates
- Heat-resistant magnets
- Industrial magnets
Frequently asked questions about magnetic grids
It is the dimension followed by the rod count: a grid 200 mm long, 200 mm wide and 50 mm high, fitted with five magnetic rods. The same logic applies across the range, from MR 100x100x50/2 up to larger units such as 250x250x50/4 and the rectangular 390x140x50/4. The rod count is the part most people overlook, and it is what decides how fine the barrier is.
Circular grids in versions 150/3, 200/4 and 250/5 state 10,500 Gs, and the strongest designs reach up to 14,500 Gs. For coarse steel fragments the standard values are sufficient. For fine iron dust, rust and abraded particles, and anywhere the finished product has contamination limits, go for the higher induction, because the particle only spends a fraction of a second in the field.
No. Grids are intended for dry, well permeable material in small to fine fractions. Sticky material bridges between the rods and blocks the flow, and abrasive material wears the rod surface. For those applications choose a plate separator, a magnetic drum or a flow-through separator, where the material does not have to pass between rods.
Most commonly the food industry, the construction materials industry, ceramics and porcelain production and the chemical industry, plus other operations processing dry material in small to fine fractions. The typical position is at the intake of a machine or before packing, where iron contamination would otherwise reach the product or damage the equipment.
No electricity and no moving parts. Once installed, a grid works continuously and quietly, and the only routine task is removing the captured iron from the rods. All separators are machined, which is what gives them their long service life. Set the cleaning interval from how contaminated the input material is and check the grid after the first week of operation.
Yes. Grids are produced in standard size ranges and also custom made to customer requirements, in square and circular designs. Send us the free cross section of the chute or flange, the material and the throughput, and we will propose the size, the rod count and the design. Accessories such as spreading roofs are available for selected models to distribute the material across the whole grid.
A magnetic grid is the simplest separator there is, which is exactly why it is so often specified wrong: the right dimension with too few rods lets the fine fraction through. We supply square and circular grids from MR 100x100x50/2 up to larger units such as 250x250x50/4 and the rectangular 390x140x50/4, with induction from 10,500 Gs up to 14,500 Gs, all machined for a long service life. Grids are made in standard ranges and to customer requirements, and we will also tell you honestly when your material belongs on a plate, drum or flow-through separator instead. Send us the chute cross section and a photo of the material and you will get a specific proposal.
