Filter Bag Media: Fiberglass

Quick Summary

Find out more about fiberglass filter bag media, it’s benefits, characteristics, pros and cons, and common applications. You can also get free access to a PDF copy of our “How to Select the Right Filter Bag” eBook!

Industry Use

Fiberglass filter media has been a leading industry standard for air filtration and applications where high temperatures are prevalent. Fiberglass media consists of dense structure of fine fiberglass filaments, and is used in industries such as chemicals, minerals, and energy pipelines and utilities.

Dust Collection Characteristics

In most cases, fiberglass media is requested in 22 ounces. Also keep in mind that fiberglass media has a sensitive bag to cage fit. Below are some of its main characteristics.

Fiberglass Filter Bag Media

Relative Cost$$$$
Max Continuous Operating Temperature500 Degrees F.
Energy AbsorptionFair
Filtration PropertiesFair
Moist HeatExcellent
Mineral AcidsPoor
Oxygen (15%+)Excellent
Performs excellent in high temperature applications up to 500 Degrees Fahrenheit.Sensitive bag to cage fit. Has poor flex abrasion qualities and would require a cage with 20 vertical wires for minimum support.
Power Plants
Cement Kilns
Carbon Black Reactors

Filter Bag Treatments & Finishes

• PTFE Membrane
• Silicone, Graphite, Teflon
• Acid Resistance
• Teflon B

Benefits of Treatments & Finishes

PTFE Membrane: If you are working with acid elements, one of the main challenges you may encounter with fiberglass media is a shortened bag life. Acids will attack and corrode the glass filament, but one way to lengthen bag life would be to add a PTFE treatment.

A normal bag collects dust on the surface of the bag. This creates a build-up of dust referred to as the filter cake. When you add a PTFE membrane treatment to a bag, the membrane begins to act as the filter cake. It allows for very little dust to stick to the bag itself. The dust stays on the surface of the membrane and does not get entrained into the fibers of the bag, allowing you to lengthen the life of your filter. Other benefits include reduced wear and tear, savings on maintenance costs, reduced energy costs, and more. Some common applications are cement/lime kilns, incinerators, coal-fired boilers, furnaces, cupola, and silica/alloy.

Silicone, Graphite, Teflon: This protects glass filament from abrasion and can add a lubricity. While it provides limited protection against chemical attacks, it is best for non-acidic conditions.

Acid Resistance: Shields glass filament from acid attacks, and can also reduce abrasion.

Teflon B: Although this provides limited resistance to chemicals, it can offer enhanced fiber to fiber resistance.

Filter Bag Resources

For additional resources on filter bag media, construction, and air-to-cloth ratio you can access our filter bag eBook below. You can also watch our “Guide to Filter Media” video here.

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