A Guide to Filter Bags

Bag filtration involves the use of felt or mesh filter bags inside a bag filter housing to remove unwanted particles, debris or sediment from the liquid being filtered. Bag filtration can be used in various industries such as, food and beverage, chemical processing, paints and coatings, industrial water treatment and solvents. The amount of debris removed from the liquid depends on the media and micron size of the filter bag. When it comes to liquid bag filtration, there are a wide range of bag options one can choose from.

felt bag filter

Felt Filter Bags

Our felt filter bags are constructed using 100% synthetic fibers in polypropylene and polyester. The proper combination of fiber diameters, weights and thicknesses result in an economical depth filter media. In order to help reduce fiber migration, the polypropylene bags are treated with a glazed finish while the polyester bags are singed. Felt filter bags have high dirt holding capacity as well as broad chemical compatibility. They are a low cost option to remove both solid and gelatinous particles from the liquid being filtered.

  • Media Options: Polyester (PES), Polypropylene (POG)
  • Micron Ratings: 1 to 200 (depending on media)
  • Size: Standard industry sizes as well as custom sizes available
  • Construction: Sewn or fully-welded (no needle holes)
  • Choice of a steel ring or a plastic flange
  • Choice of handle or no handle
  • High flow/low pressure drop

Mesh Filter Bags

Mesh liquid filter bags are available in a monofilament material or a multifilament material. Monofilament mesh bags are woven from single-fiber threads. The openings are uniform and square. The monofilament bags have excellent strength. Multifilament mesh bags are woven from threads made of smaller fibers. The multifilament bags are low cost and disposable. Mesh filter bags provide an economical removal of non-deformable contaminants and have a wide chemical compatibility.

  • Media Options: Nylon Monofilament (NMO), Polypropylene Monofilament (POMO), Nylon Multifilament (NMU), Polyester Multifilament (PEMU)
  • Micron Ratings: 1 to 1500 (depending on media)
  • Size: Standard industry sizes as well as custom sizes available
  • Construction: Sewn
  • Choice of a steel ring or a plastic flange
  • Choice of handle or no handle
  • High flow/low pressure drop

Oil Absorbing Bags

The XOAM filter bags are high capacity oil absorbing bags. These bags are a cost effective option for absolute filtration applications. The XOAM filter bags are made from 100% pure polypropylene micro-fibers combined with other proprietary oil retaining fibers. The different layers of micro-fibers retain oil and increase overall efficiency to 95% or greater. Depending on the micron, these bags can retain 10 pounds or more of oil.

  • Media Options: Polypropylene (XOAM)
  • Micron Ratings: 1 to 50
  • Size: Two industry standard sizes (Size #1 and Size #2)
  • Choice of a steel ring or a plastic flange
  • Choice of handle or no handle
  • Wide chemical compatibility

High Efficiency Filter Bags

These microfiber filter bags provide high efficiencies at lower micron ratings. These high efficiency bags, the POMF polypropylene filter bag and the PEMF polyester filter bag, have a wide chemical compatibility as well as excellent oil absorbing capabilities. The addition of a needle punched felt layer provides a pre-filter zone. This multilayer technology option contributes to a true graded density material with high performance levels and an extended life.

  • Media Options: Polypropylene (POMF), Polyester (PEMF)
  • Micron Ratings: 1 to 50
  • Size: Standard industry sizes as well as custom sizes available
  • Choice of a steel ring or a plastic flange
  • Choice of handle or no handle
  • Efficiencies to 95.0%

polyester filter bag

At Filtersource.com, we take pride that our filter bags meet all industry leading quality standards. Our wide range of liquid filter bags, from nominally rated to absolute or high-efficiency bag filters, can be used in a variety of applications. These bags are available in many different materials, sizes and ring or flange styles. Still not sure if any of these bags will work for your system? No need to worry, we can also create custom-designed bags to suit your specific application. Our filtration experts are ready to help you find the perfect filter bag for your filtration system! Contact our Sales Team today!

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