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Dust Control – Cartridge Filter or Bag Filter

There are few bulk handling processes where a cartridge type dust control filter is not suitable, however most dust control equipment manufacturers have limited options in their range so often specify the wrong media, pleat format and pleat depth for the application due to the limitations of their own product portfolio.

Filtermist’s brand Dustcheck are experts in cartridge filter selection and can supply a huge range to suit individual applications; having the unique advantage of being able to offer different pleat formats and pleat depths as well as the filter media itself.

This enables them to select the correct format for the application and provide an optimum solution where others may have to risk a compromised offering or would supply a larger, more expensive bag filter instead.

Pleat Depth

Aside from selecting the right filter media, the vital consideration is to ensure that you use the correct cartridge format for the type of dusts being handled.

The correct application of pleat depth and spacing of a cartridge will depend on the characteristics of the material you are filtering. If the particulate is fine and free flowing the 50mm deep tight pleated elements are usually adequate and these are the standard offering by most filter unit manufacturers.

Even in this format the elements provided by Dustcheck have superior performance due to ridges being made in the media during the manufacturing process which keep the pleats apart and minimises ‘closing’ under dust load.

This occurs when dust enters the ‘valley’ between the pleats and air pressure pulls the pleats together, sandwiching and trapping the dust and hindering efficient cleaning. Our control measures enable Dustcheck units to maintain less differential pressure and more consistent air flow; prolonging cartridge life and saving energy.

With difficult applications and challenging particulates i.e., fibrous or less free flowing – deep pleated elements may not be the correct solution. Most filter suppliers would either not be able to provide a solution at all or would spec a higher cost bag filter, but Dustcheck can provide cartridges with alternative pleat depths and spacing such as the 25mm and 20mm pleat options, enabling them to tailor the filter to the requirements of the application while maintaining the benefits of a compact, cost effective solution.

Significant advantages

Cartridge filters give significant advantages over bag filters:

  • Compact footprint
  • Higher efficiency than equivalent bag media
  • Saves time on maintenance as cartridges are easier to replace

Correctly applied, cartridges will out-perform bags in efficiency and filter-life in most cases. The only limitation with cartridge filters is the temperature at which they can operate; circa 130oC. Bag filters can significantly exceed this, however in some instances it is possible to utilise additional dilution air to reduce process temperature to within the limits of a cartridge filter.

Filter bags are usually cheaper than cartridges, but when considering the increased filter area of a cartridge filter, the reduced number of elements per unit, minimal maintenance and less production down-time –  the ‘whole of life costs’ can be significantly lower.

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Their cartridges are primarily offered in conical format which offer clear advantages in comparison to parallel designs – find out how here: https://www.youtube.com/watch?v=8bOZp9d5X8I&feature=emb_logo .

For more information on Dustcheck products visit: www.dustcheck.com

 

 

 

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