Short Filter Bag Life

The following list may be helpful in performing some preliminary checks:

1. Temperature – operating the gas temperature above the recommended limit of the filter bag material.
2. Chemical Attack – the filter media can degrade due to attack from certain chemicals in the dust or gases in the air stream.
3. High Moisture - a high moisture content in the collector may cause certain filter bag materials to shrink or degrade. The process will be accelerated at elevated temperatures.
4. Localized Abrasion – premature bag wear can occur near the tops of the filter bags if the bag and cage assemblies have been installed improperly or if an accumulation of dust on the clean side of the tubesheet has developed which may abrade the elements during the pulsing cycle. Localized abrasion can also occur near the bottom of the filter bags in the vicinity of the dust gas inlet. If this situation exists, an inlet baffle may be required to deflect the incoming gas stream if one does not already exist.
5. Cage Deterioration – corroded, rusted or broken filter bag cage assemblies can cause excessive bag wear. Stainless steel or coated cages are available.
6. Filter Bags Rubbing – premature wear can occur if the bags are found rubbing against each other or against one of the interior walls of the unit.