Magnetic filtering

Magnetic filtering

Magnetic separators filter ferrous and weakly magnetic metals from product flows. These contaminations can remain in your end product and cause rejection, but can also damage your process machines.

Examples of ferrous contamination in your production line: rivets, nails and screws of packaging, loosened bolts and nuts, wear of moving parts, rust or corrosion.

We offer you a wide range of magnetic separation systems and iron filters, that are suitable for removing large loosened parts, up to very fine wear particles. And with manually to fully automatic cleaning systems.

  • Engineering, production & service
  • According to your requirements
  • In-house test centre
  • 60 years of experience
  • EHEDG certified
Read more Read less arrow
Tube magnet, magnetic separator | Goudsmit Magnetics
Magnetic bars

The building blocks of many magnetic separators, that filter small ferrous contaminations out of your powders and granulates. The strongest bars can e...

Magnetic grate quick-cleaning iron filter | Goudsmit Magnetics
Magnetic grids

For free-flowing powders and granulates. Often placed at a pouring point and used for control purposes. All SS316.
Manual quick-cleaning by extra...

Cleanflow magnetic drawer SECE (easy clean) - semi-automatic cleaning | Goudsmit Magnetics
Cleanflow magnets

For powders and granulates in free-fall processes in all industries. Many types and options, like basic, food and pharma, as welll as ATEX approved an...

Hygienic EHEDG magnetic liquid trap SFH - manual cleaning | Goudsmit Magnetics
Magnetic filters for pressure lines

For liquids and powders that are transported under pressure. Max. 10 bar / 140°C.
Often used in food and pharma industries. Many types and options...

Permanent bullet magnet - magnetic separator SPP - manual cleaning | Goudsmit Magnetics
Bullet magnets

For coarse raw materials in free-fall processes. Often used in eg. the bulk, animal feed, plastics, ceramics and recycling industries. Manual cleaning...

Plate magnets and block magnets for ferrous contaminants removal | Goudsmit Magnetics
Plate & block magnets

The building blocks of many magnetic separating systems, that filter larger ferrous particles out of your coarser product streams. For hanging above o...

Chute magnet - plate magnet with mounting system | Goudsmit Magnetics
Chute magnets

Chute magnets are plate magnets including a cleaning mechanism and mounting construction. A simple, cost-effective magnetic separator that you can mou...

External pole magnetic separator with in-/outlet adapters | Goudsmit Magnetics
External pole magnets

For coarse raw materials in free-fall processes. Large solids can easily pass, because the passage is unobstructed. Often used in eg. the bulk, animal...

Cascade magnet separator for coarse products - automatic cleaning | Goudsmit Magnetics
Cascade magnets

For coarse raw materials in free-fall processes. The cascade shaped housing forces the product to closely pass three plate magnets while still providi...

Drum magnetic separator - continuous automatic cleaning | Goudsmit Magnetics
Drum separators

For product flows that are highly contaminated with ferrous particles.
From types for granulates to types for fine powders and fine ferrous partic...

Magnetic sweeper for sweeping iron particles from your floor | Goudsmit Magnetics
Magnetic sweepers

Sweep up iron and steel parts from clean or rough floors or sandy surfaces. In places where iron is not or very difficult to sweep together or is not ...


Application - trap and remove metal contaminants

Metal foreign bodies contaminate your product, and they can also cause severe damage to your machinery. Rejection of batches is costly, but it can be even more costly if the foreign bodies are not removed, making it necessary to conduct a product recall. You will then be faced with enormous costs and reputation damage.

Examples of ferrous metal contaminants / foreign bodies:
pieces of iron, steel or stainless steel in the raw material, staples, nails and screws, bolts and nuts that have vibrated loose, wear of the moving parts, rust, corrosion.

Magnetic separators filter  and remove ferromagnetic foreign bodies from your product streams, in order to guarantee high product quality and prevent damage to machines.

Important considerations when choosing a magnetic separator

Do I need a magnetic separator or a metal detector?

magnetic separator filters or traps or immediately removes the metal contaminants from the product flow. Magnetic separators cause practically no product loss and are suitable for removal of regularly occurring and larger quantities of metal contamination.

metal detector is mainly used as a means of inspection for sporadically occurring metal contamination, or for removing non-magnetic foreign bodies. A metal detector only detects; to remove the metal particle, the production line has te be stopped, or a rejection mechanism should eject the metal particle – which will also remove product along with it and causing loss of product.

Three good reasons to install a magnetic separator

1. Magnets improve your product quality and purity

Contamination or foreign bodies in food products can lead to claims, very costly product recalls and reputational damage. And not just in food: even the smallest foreign bodies are undesirable in pharmaceutical, chemical or mineral bulk streams and lower the quality of the finished product.


2. Magnets prevent damage to your production machinery

By placing a magnetic separator before the inlet of your production machinery – such as grinders, ball mills, pin mills, calenders and crushers – you prevent damage to your machinery and production standstill. A magnetic separator very effectively filters metal contaminants from your bulk stream; they function continuously and provide a high level of operational reliability.

3. Magnets prevent dust explosions

Fine dust in combination with oxygen and a source of ignition can result in dust explosions. By filtering metal particles out of the product flow in advance, magnets remove an important ignition source: the impact of metal on metal. This prevents serious injuries  and high costs from damage to your machines.

Many of our magnetic separators are suitable for use in ATEX zone 20/21. As a certified manufacturer of ATEX equipment, Goudsmit has an externally certified quality assurance system that guarantees the explosion safety of our magnetic separators.

Different types of magnetic separators

We manufacture three types of magnetic separators, each with its own specific characteristics and applications:

1. Magnet separators with plate or block magnets -suspension magnets

have a deeply penetrating magnetic field for capturing ferromagnetic metal particles as small as 1 mm. Plate magnets, chute magnets and external pole magnets are used in pipeline transport (inline magnetic separators). These systems are always permanently magnetic.

Suspension magnets or large block magnets with and without a conveyor system, such as overbelt magnets,  pull pieces of metal out of a material stream on a passing belt; these types can be found in the main group Recycling & Sorting. These systems can be permanently magnetic or electromagnetic.

2. Magnetic separators with magnetic bars

 have an extremely powerful yet less deeply penetrating magnetic field. They are therefore best suited for trapping small ferrous contaminants and even weakly magnetic (e.g. cold-worked stainless steel) contaminants as small as 30 µm out of bulk streams in filling openings and pipelines.
Magnetic grids, Cleanflow magnets and magnetic filters make use of bar magnets.

3. Magnetic separators with cylindrical

magnets are used in our bullet magnets, drum magnets, head roller magnets and Eddy Current non-ferro separator. With the exception of the bullet magnet, these magnets do not hold the captured metal particles (for periodic disposal) but rather dispose of them directly and continuously. They are therefore capable of separating or sorting large quantities of metal particles.

Pipe magnets and drum magnets can be found on this page. Extra robust types of drum magnets, head roller magnets and Eddy Current separators can be found in the  group Recycling & Sorting.