String Wound Bag Filter


The BRF Series string wound bag filter replacement filters are used to replace standard #2 filter bags (aka sock filters).  String wound cartridges offer depth and increased dirt holding capacity.  These filters increase change out intervals up to 20 times when compared to traditional bags.

String Wound Bag Filter

The string wound bag filters are particularly useful in water filtration applications where high concentrations of organics exist, high silt concentration or high solids blind off bags quickly.   These filters offer more depth to trap soft particles and hold a large volume of particulate.

These are ideal for remote areas and applications where labor costs are high to change out filters.

String wound bag filter element

Features & Benefits

  • Over 500 cubic inches of depth media
  • Replaces standard #2 bags
  • For use in most OEM Bag Filter Vessels
  • Save on labor costs
  • Multiple configurations available
  • Reusable O-Ring
  • Reduce filter ruptures and contamination of downstream process


  • Fracking Water
  • Ground Water
  • Waste Water
  • Precipitated Solids
  • Waste Oil
  • Dewatering
  • Pond Water
  • Irrigation
  • Water Injection


  • Bleached Cotton
  • FDA Bleached Cotton
  • Natural Cotton
  • Polypropylene
  • FDA Polypropylene
  • Fibrillated Polypropylene
  • Fiberglass
  • Rayon 
  • Polyester
  • Nylon

Center Core:  Polypropylene

Inside Diameter:  3″

Outside Diameter:  6″

Length:  24″ (others available)

Recommended Changeout:  35 PSID

Micron Ratings:  1, 5, 10, 25, 50, 100, 150, 200

Flow Rate Range:  80-125 GPM