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Liquid Bag filters are used in a variety of industrial applications. They provide an economical and scalable method of filtration for liquids at a variety of flow rates, temperatures, chemical compositions and micron ratings, and can be an effective first stage of filtration in large systems. Most filter bag systems are installed into a retainer basket in a pressure vessel (a ‘closed’ system), matched to the parameters of the specific application.

The most common filter bag media are polyester felt, polypropylene felt and nylon mono-filament. However, there are countless media available to create custom filter bags, from oil adsorbing to high-temperature, many of which are in stock at our warehouse. The following is a general guide to help define the specific media for your application, and you can also visit our filter bag sizing guide page.


Polyester Polypropylene Nylon
Max Temp (F) 275 200 275
Max Temp (C) 135 95 135
Specific Gravity (gr/cm3) 1.38 0.91 1.14
Acids Good Excellent Poor
Organic Acids Good Excellent Poor
Alkali Poor Excellent Excellent
Aliphatic Solvents Good Fair Good
Aromatic Solvents Good Poor Good
Alcohols Good Good Good
Ethers Good Poor Good
Hydrocarbons Poor Excellent Poor
General Sediment Excellent Excellent Excellent
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