Data Sheet: PTFE Felt Filter Bag 830 g/m2 (24.5 oz/yd2)


A 260°C (500°F) maximum service temperature, expanded polytetrafluoroethylene (PTFE) felt filter bag for use in pulse-jet style dust collectors with chemically aggressive operating conditions.

Features and Benefits

  • Patented GORE™ High Durability membrane technology provides an excellent combination of filtration efficiency, airflow, and durability
  • Chemically inert, providing the highest all-around chemical resistance and maximum bag life
  • Constructed using a woven ePTFE scrim that provides excellent dimensional stability, extended flex life, and resistance to mechanical damage over the life of the filter


  • Chemicals processing: chemical process reactors that incorporate micronizing, grinding, and product collection in extreme environments that are chemically and thermally aggressive
  • Minerals processing: brick kilns
  • Metals processing: lead, copper, and other base metal production
  • Power generation and Incineration: medical and municipal waste incineration, as well as coal-fired boilers

Technical Specifications

Fiber content

Staple – GORE Expanded Polytetrafluoroethylene
Scrim – Woven Expanded Polytetrafluoroethylene

Felt construction

Supported needlefelt

Continuous operating temperature

260°C (500°F)

Maximum surge temperature

274°C (525°F)

Acid resistance


Alkali resistance



830 g/m2 (24.5 oz/yd2)

Breaking strength


- Warp:

890 N/5 cm (200 lb/2 in) wide sample

- Fill:

824 N/5 cm (185 lb/2 in) wide sample

Mullen Burst

4136 kPa (600 psi)


1.07 mm (0.042 in)

Thermal Stability

< 2% shrinkage at 260°C (500°F) after 2 hours (unrestrained)


Very good


Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations.