Fibreglass filter bags, up to 260 °C.
Fibreglass is the highest-temperature common filter bag media, rated up to 260 °C continuous, and the standard for reverse-air baghouses. Masturlal finishes it with PTFE, graphite or silicone to protect the glass fibres and help dust release. Glass is chemically stable but sensitive to flexing and abrasion, so it suits gentle reverse-air cleaning better than high-energy pulse-jet.
- Continuous temperature
- up to 260 °C
- Finishes
- PTFE, graphite, silicone
- Bag sizes (reverse-air)
- 200–400 mm diameter, up to 25 m long
- Cleaning life
- Rated for 50,000+ cycles
Where it works
- Reverse-air baghouses
- Cement kilns and alumina calciners
- Coal boilers and steel sinter plants
- Continuous temperatures up to 260 °C
Where to avoid it
- High-energy pulse cleaning without the right construction
- Very abrasive dust at high velocity
- Hydrofluoric acid (HF), which attacks glass
Typical applications
Cement kilns, alumina calciners, coal boilers, steel sinter plants, furnaces.
How it compares
| Fibre | Continuous temperature | Strengths | Watch out for | Typical duty |
|---|---|---|---|---|
| Polyester | up to 150 °C | Low cost, good abrasion resistance | Hydrolysis in hot, moist gas | Cement mills, packing, crushers, general dedusting |
| PPS (Ryton) | up to 190 °C | Resists acids and alkalis | Oxidation at high O₂ | Coal-fired boilers, waste incineration |
| Meta-aramid (Nomex class) | up to 204 °C | Strong, abrasion resistant | Acid attack and hydrolysis | Asphalt, foundry, cement raw mills |
| P-84 polyimide | up to 240 °C | Trilobal fibre, fine-dust capture | Hydrolysis in very moist gas; cost | Cement kilns, waste-to-energy |
| Fibreglass | up to 260 °C | Highest temperature, chemically stable | Flex and abrasion; needs a finish | Reverse-air kilns, calciners, furnaces |
| Ultra-microfibre surface (13–15 µm) | set by base fibre | ≤5 mg/Nm³ with low pressure drop | Must be specified to the dust | Any of the above where emissions matter |
What to send for a recommendation
- Collector type (pulse-jet, reverse-air or shaker) and the collector drawing
- Bag diameter, length, top and bottom construction, and quantity
- Continuous and peak gas temperature
- Dust chemistry, moisture, acid dew point and particle size
- Current bag specification, bag life and differential pressure
- Emissions target
Questions, answered.
What temperature can fibreglass filter bags take?
Up to 260 °C continuous, the highest of the common filter bag fibres.
Why do fibreglass bags need a finish?
The finish (PTFE, graphite or silicone) lubricates the glass fibres so they do not abrade each other when the bag flexes, and helps the dust cake release.
Can fibreglass be used in pulse-jet collectors?
It can, with the right felt construction and careful pulse settings, but P-84 or aramid is usually preferred for pulse-jet because they tolerate flexing better.
Send us your dust profile.
Temperature, chemistry, moisture, particle size and your emissions target. An application engineer replies within one working day, usually with a media specification within two.