Rotary Magnet

The rotary magnet is suitable for magnetic filtration of small amounts of ferrous contaminants from poorly flowing – e.g. fatty – powders in free-fall transport pipes. Rotation of the magnetic bars prevents bridging and blockages. The product must not contain any ferromagnetic parts large or heavy enough to cause damage to the magnetic bars.

The rotary magnet can be used for powder and granular products (grain size from 30 µm to 10 mm) such as flour, sugar, coffee beans, plastics, ceramics, etc. If even smaller or weakly magnetic stainless steel particles need to be filtered out, the device can be equipped with even more powerful Neoflux® magnets.

The rotary magnet can be adapted for almost any product flow. The standard version already has few slits and mainly stainless steel materials in the product channel. The product channel (or even the complete housing with magnetic bars) can be supplied in crevice-free AISI304 or AISI316, in combination with other – e.g. customer-prescribed or supplied – food-grade materials. Surface treatments such as electro polishing, pickling, etc. are of course also possible.

The rotary magnet is NOT suitable for use in sticky or damp product flows and environments.

Capacity

The rotary magnet is intended for use in product flows with a maximum capacity of 9 to 45 m³/hour, depending on the size and number of magnetic bars in the device. Sizes of 150mm, 200mm, 250mm & 300mm are available to suit the capacity.

NOTE Preferably place a sieve before the product inlet of the device in your installation.

Magnet quality

The device is equipped with magnetic grade GSN-42, GSN-42SH or GSN-52. The table below shows the field strengths (magnetic flux density values).

Magnetic quality applied
(at 20°C and Tmax 80°C)
Magnetic bar / extractor tube size
[mm]
Field strength (flux density)
measured on magnetic bar (±10%)
Field strength (flux density)
measured on extractor tube (±10%)
GSN-42
(Br 13,300 gauss)
Ø23 / Ø25 10,700 gauss 8,000 gauss
GSN-42SH
(Br 13,700 gauss)
Ø30 / Ø32 13,000 gauss 10,500 gauss
GSN-52
(Br 14,800 gauss)
Ø23 / Ø25 12,000 gauss 8,800 gauss

Temperatures

Using standard Neodymium (NdFeB) magnets, the device is suitable for the following ambient and product temperatures:

Magnetic quality applied Max. ambient temp. Max. ambient temperature (ATEX) Max. product temp. Max. product temp. (ATEX)
GSN-42 / 52 60 °C 40 °C 60 °C 60 °C
GSN-42SH 60 °C 40 °C 80 °C 60 °C

The device must be protected from higher than prescribed temperatures, as the magnets permanently lose magnetic strength when exposed to high temperatures.

Standard Features

  • Quick access clamps
  • Central infeed and discharge
  • Food grade certificates

Safety Features

  • Full guarding
  • Safety switch
  • Operation and maintenance manuals
  • Air purge shaft seals

Material of Construction

  • Carbon steel
  • 304 Stainless steel
  • 316 Stainless steel

Options

Types

  • Gravity
  • Vacuum to <0.5 bar
  • Pressure to <0.2 bar
  • Special cleaning units

General

  • Sanitary finish
  • Atex & IECEx
  • Custom designs

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Want to know more about our Rotary Magnet machines and how they could fit into your process solutions plans?

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