Proper Filter Bag Tension For Reverse Air Baghouses
The proper tension on a reverse air bag should be two (2) pounds per 1" of circumference (ex. 11-1/2" diameter x 3.1416 (p) = 36.11" circumference x 2 lbs. = 72 lbs. tension.).
- Premature bag failure results from unnecessary stresses to the yarns and sewing threads of the bags, and typically failures occur around the cuff and anti-collapse rings.
- Excessive tensioning also prohibits the proper flexing needed to release the dust cake during the cleaning cycle.
- Allows excessive horizontal movement causing bag-to-bag abrasion.
- Too much slack allows the bag to fold over the thimble and these creases are sandblasted from the inlet dust.
- The flexing at these folds also leads to self-abrasion of the fabric.
- The bag collapses, choking off and preventing the dust from falling out of the bag. This causes dust re-entrainment resulting in a higher delta P across the bags and reduced air flow.