Image courtesy of Eisenmann


Bag filtration is a commonly used method to separate particles from fluids in a wide range of applications. Bag filters generally have low equipment investment cost and are tolerant of various process conditions.

Typical processes where bag filtration is used are automotive paint facilities where iron particles are carried from the body shop into the paint shop pre-treatment lines. MHD experience has learned that up to 80% of the pollution in the degreasing sections of paint shop pre-treatment lines are ferritic particles. Inserting magnetic bars in filter bags significantly reduces time spent on bag changes. The ferritic particles will not be separated by the filter bag itself but will be captured on the outer surface of the magnetic bars. Because of this the maximum pressure drop will be reached after a longer operational time of the filter bag, significantly reducing maintenance costs and environmental impact.

The standard MHD SCRAPERMAG is compatible with the type 2 filter bags (length 700 mm) and consists of a stainless steel cage with 1 magnetic bar. The magnetic bar can be pulled almost completely out of the cage. During this the captured ferritic particles are scraped off the magnetic bar by a NBR ring.

The MHD SCRAPERMAG for sizes other then the type 2 filter bags is available on requests.


The SCRAPERMAG consists of 3 main components:

  • Stainless steel BAG LOCK with handle
  • Magnetic element with handle
  • Scraper and fixation plate


The MHD SCRAPERMAG has various advantages:

  • SCRAPERMAG easily inserted in and removed from filter bag
  • Magnetic bar easily cleaned by scraper system
  • Magnetic bars cannot be completely removed from the BAG LOCK
  • High magnetic flux density for particle separation


  • Material:                                                stainless steel 1.4301
  • BAG LOCK dimension:                       Ø 155 mm – L = 700 mm
  • Magn. surface area:                            785 cm(Ø 40 mm – L = 625 mm)
  • Induced magn. flux density:              1.28 Tesla (12800 Gauss)
  • Effective magn. flux density:            0.6 Tesla (6000 Gauss)
  • Weight:                                                  7.8 kg
Simon Stevinstraat 1
NL-3261 MG Oud-Beijerland
The Netherlands