Pulse-jet and plenum pulse baghouses collect dust on the outside of the filter. Dust laden gas floods the baghouse, and clean air exits through the inside of the bag while the dust particles collect on the outside filter surface.

A support cage prevents bag collapse during filtration and aids in the re-distribution and cleaning of the dustcake. A wide variety of filter bags can be manufactured to meet specific application needs.

BHA developed the snapband
to improve sealing efficiency.

• Snapband Cuff with double beaded gasket to fit plasma cut, punch cut, laser cut, extruded lip, and some collared tubesheets. The snap- band style was developed to improve sealing efficiency. (#1)
• Flange Top bags have a donut-shaped piece of fabric which is sewn to the top of the filter bag and forms a seal when compressed between the tubesheet and the cage top. (#2)

BHA Bags for Pulse-Jet and
Plenum Pulse-style collectors

• Ring Top bags have rings sewn in the flange. (#3)
• Sleeve Top is a separate piece of fabric sewn onto the bag body so that it extends beyond the bag body. These are used in lieu of a raw edge to prevent puckering when folding the bag into the cage. (#4)
• Hem Top woven glass bags are folded back and sewn to avoid unraveling. (#5)
• Raw Edge felt bags have an unhemmed open end. (#6)
• Disc Bottom bags have a round or oval enclosure attached to the bag body, using an overlock stitch on felts and lock stitch on wovens. Two-ply discs are traditionally sewn to woven glass bags. (#4 on Reverse Air Bags page.)
• Tuffskirt is a separate piece of fabric sewn around the bag body with a portion of the fabric extending below the disc to help protect it from wear and inlet abrasion. (#7 on Reverse Air page.)
• Wearstrip is a separate piece of fabric sewn around the bag body. This fabric piece helps prevent bag-to-bag and bag-to-cage abrasion.