Primary (Continuous) Dusting

A continuous flow of dust out of the exhaust of the clean air plenum is considered a primary dusting problem. Other causes of this condition are as follows: Holes in the Filter Bags or Bags Incorrectly Installed – inspect the filter bag assemblies for holes, rips, tears, or excessive wear. Make sure that the filter bags were installed correctly and that no bag/cage assembly has dropped off. Check the tubesheet for holes, cracks or loose bolts that would permit dusty air to bypass the filter bags. If primary dusting is noted, the problem should be investigated immediately. Dust in the clean air plenum can be blown back into the bags during the pulse cleaning. The dust can be extremely abrasive and could seriously abrade holes in an entire set of bags in a very short time.