Best Available Technology
  for Fine Particulate Collection
Surface v. Depth Filtration
This slide shows the difference between surface filtration and depth filtration.  Conventional felt and woven fabrics require that a dustcake be built up on the surface of the media to achieve an acceptable filtering efficiency.  During this process particulate is allowed to migrate into the depths of the media and eventually some will make it all the way through and out the clean side.  This plugs some of the pores of the media up with particulate causing a depth filtration fabric to operate at much higher differential pressures.

BHA-Tex is laminated to the collection surface making any conventional felt or woven fabric now a surface filtration product.  Since all of the dust is trapped on the surface of the media the pores of the filter bag are not plugged up.  The fabric will operate at a much lower differential pressure over a longer period of time.  Also, when the baghouse goes through a cleaning cycle the BHA-Tex media will clean down to a “like new” state.