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. Inserting magnetic bars in filter bags significantly improves the life-time of the bags. 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, 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 up to 3 magnetic bars. 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.