Pleated Filter Bags

For more than two decades, Donaldson has advanced the proven and proprietary Ultra-Web® technology. Made with an electrospinning process that produces a very fine, continuous fiber of 0.2-0.3 micron in diameter, Ultra-Web nanofibres form a permanent web-like net with very fine interfiber spaces that trap dust on the surface of the media. Combining superior Ultra-Web technology with a sturdy spunbond polyester substrate, the Ultra-Web SB pleated bag filters deliver longer filter life, higher efficiency, and greater cost savings for baghouse collectors. Donaldson also offers an oval configuration to the pleated filter bag program that allows Donaldson to put its nanofibre technology into all popular makes and models of baghouse collectors.

  • Advanced media is more efficient in capturing submicron dust particles (0.3 micron and larger)
  • Longer filter life and better pulse cleaning due to surface loading technology
  • Lower energy use with better pulse cleaning and lower operating pressure drop
  • Cleaner air, longer filter life, and greater cost savings

Our Advantage is your Solution

Why pleated bags? Ultra-Web SB pleated bag filters are engineered to deliver solutions for most  common baghouse problems.


Pleated Filter Bag Solution

Not Enough Filter Area

​Pleated bag filters can provide almost twice as much filtration area in existing equipment due to the increased media in the pleat pack design.

High Pressure Drop

​Increasing filter area causes the air to media ratio to decrease when the airflow stays the same. The pressure drop also decreases.


Pleated bag filters are shorter than the fabric bags they’re replacing. This allows for a larger drop out area and less opportunity for bag abrasion.

​Stack Discharge

Ultra-Web SB offers all the benefits of spunbond media, plus the superiority of nanofiber technology allowing for the capture of submicron particulate reducing stack emissions.

Short Life

Pleated bag filters offer up to 2-3 times the filter life over 16 oz. polyester felt bags.

Take a Closer Look at our Pleated Bag Filters

    •    Patent-pending, aerodynamic designed high flow opening generates 30% more cleaning energy.

iSeal Gasket
    •    Soft, gray EPDM ensures easy and secure fit for top load collectors. (Patent pending)

One-Piece Construction
    •    Filter and cage together in one-piece design make changeouts easier.

FIlter Media
    •    Ultra-Web® SB outperforms the standard spunbond products.

    •    Longer life
    •    Higher efficiency
    •    Lower pressure drop
    •    Tolerates chemicals & moisture.
    •    Temperatures up to 250°F/121°C.

Oval Design
    •    Includes hold down hardware.

Molded Urethan Top Construction
    •    Unique, one piece molded design for top load collectors eliminates potential leakage point at tubesheet.
    •    Soft Polyurethane boot installs easily on bottom load applications.

    •    Superior urethane attachment method.

Pleated Pack
    •    Pleated media increases effective area without adding more equipment.
    •    Consistent pleat spacing to enhance cleaning.