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We offer full bag testing capabilities. Simply send us a used bag, along with as much detailed information as possible. We will fully examine your bag, including microscopic photography, and evaluate the results.
The differential pressure gauge or manometer on your dust collector should read 6″ w.g. or less. Higher readings and/or steadily increasing readings will result in a reduction of the main air flow through the dust collector which may produce a potential process problem such as poor suction through the evacuation control system. In extreme cases (over 10″ w.g.) filter elements will be damaged.
In addition to inspecting the filter bags for proper installation or holes or tears, the following items should also be considered: Pressure Gauge Working - check the differential pressure gauge and the tubing leading to the dust collector. Ductwork, Dampers – inspect the ductwork to and from the dust collector for air leaks or blockage. Make sure that any dampers in the system are correctly positioned to allow air to flow through the dust...
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...
Puffs of dust that are noted in the exhaust of the clean air plenum after each cleaning pulse is a secondary dusting problem. This condition is normal with new filter bags, and should stop after the first several hours of operation.
This is often a complicated problem to diagnose, and we recommend that you call us for advice.