Filter bag configurations can vary from one dust collector to another. Baghouse filter top and bottom configurations will be dependent on the type of baghouse dust collector you have. The most common types of baghouses are pulse-jet and plenum pulse, reverse air, and shaker.
Pulse-Jet and Plenum Pulse Baghouse
Pulse-jet and Plenum Pulse baghouses collect dust on the outside of the filter. Dust-laden gas floods the dust collector, and clean air exits through the inside of the bag while dust particles collect on the outside filter surface. A pulse-jet is one of the most common styles of baghouses will see across a variety of industries and applications. The most common types of filter top and bottom configurations in this style of baghouse are:
Top Load Baghouse Filter: Double Beaded Snap Band Top, Disc Bottom
Bottom Load Baghouse Filter: Raw Top, Disc Bottom
Reverse Air Baghouse
In reverse air baghouses dust will collect on the inside surface of the filter. Air enters the dirty side (inlet) of the baghouse and flows upwards through the bag. The bag filters and collects the dust on the inside, then clean air exits through the top of the bag. Reverse air baghouses are typically seen in large air handling applications like energy.
Top Configuration: Compression Band with Cap & Hook
Bottom Configuration: Compression Band, Corded, Double Beaded Snap Band
The way shaker baghouses collect dust is similar to reverse air baghouses. Dust is collected on the inside of surface of the filter. Dust particulate is filtered and collected on the inside of the filter, then clean air exits through the top of the bag. The difference in this system is in how the bags are cleaned. Filter bags are hung and tensioned from the top of the unit, and at the bottom they are attached to a tube sheet. As the name suggests, you clean the bags by mechanically shaking them. Shaker baghouses are generally simple, and can be seen in applications where there is no compressed air available.
Top Configuration: Grommet Top, Loop Top, Strap Top
Bottom Configuration: Corded Cuff Bottom, Double Beaded Snap Band
Filter bag construction and dimensions vary between industries, applications, dust collector types and manufacturers. Here are some of the filter bag top and bottom configurations you may come across.
Most Common Baghouse Filter Configurations:
- Double Beaded Snap Band
- Disc (with or without wear cuff)
- Sewn Flat
- Open Hemmed
- Raw Edge
Least Common Baghouse Filter Configurations
- Disc with zipper
- Belt Loops
Other Baghouse Filter Configurations
- Snap Ring
- Double Disc
- Compression with Cap and Hook
Baghouse Filter Resources
To learn more about how to select the right filter bags , you can download our filter bag eBook with the link below. The ebook provides resources on key topics such as; dust properties, filter media, finishes and treatments, construction, and air-to-cloth ratio.
Video: Guide to Filter Media
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