PTFE Bag Filter (Teflon)
pH 0–14 Chemical Resistance, 240 °C Continuous Operation and a Non-Stick Surface
The PTFE bag filter (Teflon) is a fluoropolymer felt filter used for aggressive industrial dust filtration that requires continuous operation up to 240 °C and very wide chemical resistance.
700–800 g/m²
240 °C
260 °C
pH 0 – 14
What Is a PTFE (Teflon) Bag Filter?
PTFE (polytetrafluoroethylene), commonly known as Teflon, is a fluoropolymer material noted for its high temperature resistance and chemical inertness. PTFE bag filters, made by turning this material into bag filters, were developed for industrial filtration applications with extremely demanding operating conditions. Withstanding 240 °C continuously and 260 °C peaks, these bags offer a clear advantage in processes where media such as conventional polyester or Nomex fall short.
PTFE’s low surface energy makes it harder for dust to stick to the bag filter, so pulse-jet cleaning systems work more effectively and bag life is extended. Its chemically inert structure gives high resistance to acids, bases, oil vapours and corrosive gases. High filtration efficiency helps reduce emissions, supporting compliance with environmental regulations and improving plants’ environmental performance.
Product Identity and Technical Summary
Prosestim PTFE (Teflon) bag filters are made by needle-punching 100% pure polytetrafluoroethylene fluoropolymer fibres in the 700–800 g/m² weight range. Thanks to a continuous operating temperature of 240 °C, complete chemical inertness across pH 0–14 and absolute resistance to hydrolysis, they keep the bag intact on extremely aggressive flue gas lines where conventional filter media break down; with the ePTFE membrane option, they achieve ultra-low emission performance of ≤ 1 mg/Nm³ for sub-micron particles.
Key Technical and Structural Features
- Fibre Type
- PTFE (Polytetrafluoroethylene / Teflon) Needle-Punched Felt
- Weight
- 700–800 g/m²
- Continuous Operating Temperature
- 240 °C (Dry)
- Peak (Surge) Temperature
- 260 °C (Dry)
- Chemical Resistance
- Outstanding resistance to acids, alkalis, oil vapours and corrosive gases across the full pH 0–14 range
- Surface Property
- Naturally non-stick — low surface energy, outstanding dust release
- Hydrolysis Resistance
- Excellent — stable performance through humidity, condensation and dew point transitions
- Emission Performance
- ≤ 5 mg/Nm³ (≤ 1 mg/Nm³ with ePTFE membrane)
- Cage Support
- A cage with at least 20 vertical wires is mandatory
- Cleaning System Compatibility
- Pulse-Jet
- Reverse Air
- Shaker
- Sewing Thread & Seam Construction
- High-strength triple-row stitching with 100% PTFE sewing thread; no risk of thermal or chemical melting.
PTFE (Teflon) Bag Filter Surface Treatment Options
The surface treatment applied to the PTFE felt medium directly affects the emission value and dust release performance.
| Surface Finish | Property | Recommended Application |
|---|---|---|
| Singeing | Smooths the surface and improves dust release. | General high-temperature and chemical applications |
| Calendering | Smooths the surface and is compatible with pulse-jet cleaning systems. | General industrial applications |
| ePTFE Membrane | Provides surface filtration, ≤ 1 mg/Nm³ emission performance and high dust release performance. | Applications requiring ultra-low emission limits |
| Antistatic | Helps dissipate static charges in a controlled way. | Applications involving combustible dust |
Advantages of the PTFE (Teflon) Bag Filter
- Chemical Resistance Across the Full pH Range
- Outstanding chemical inertness to acids, bases, oil vapours and corrosive gases across the full pH 0–14 range; chemical compatibility no other fibre medium can match.
- High Temperature Resistance
- Withstands 240 °C continuously and 260 °C peaks; works reliably in processes where other high-temperature media, including Nomex, fall short.
- Naturally Non-Stick Surface
- Thanks to its low surface energy, the dust cake separates easily; pulse-jet cleaning systems work more effectively and the risk of media blinding is minimised.
- Excellent Hydrolysis Resistance
- The fibre structure does not break down through humidity, condensation and dew point transitions; stable performance in the most humid and corrosive flue gas environments.
- Long Service Life
- 3–5 times longer service life than standard filtration media; the high initial cost turns into a low total cost of ownership over the long term.
- Ultra-Low Emissions
- Emission values of ≤ 1 mg/Nm³ with an ePTFE membrane; compliance with environmental regulations and improved environmental performance for plants.
Industry Applications
Bag filters suited to different process needs are used across a wide range of industrial applications to protect product quality and production continuity.
01
Vegetable Oil
Clarity, purity and shelf life in vegetable oil and refining.
Explore solutions
02
Pipe and Profile
Cooling water filtration in pipe and profile extrusion.
Explore solutions
03
Paint Industry
Surface quality and pigment filtration in the paint industry.
Explore solutions
04
Glass Industry
Furnace and process filtration in the glass industry.
Explore solutions
05
Dialysis Centers
Water preparation and process filtration in dialysis centers.
Explore solutions
06
Foundry Industry
Equipment protection and dust filtration in foundries.
Explore solutions
07
Industrial Oil
Filtration in industrial oil production and recovery.
Explore solutions
08
Energy and Biogas
Maximum efficiency and turbine protection in energy and biogas.
Explore solutions
09
Recycling
Filtration for efficiency and environmental compliance in recycling.
Explore solutions
10
Food and Beverage
Hygienic filtration in food and beverage.
Explore solutions
11
Pharmaceuticals and Biotechnology
GMP-compliant sterile filtration in pharmaceuticals and biotechnology.
Explore solutions
12
Paper and Packaging
Process water filtration in paper and packaging.
Explore solutions
13
Chemical Industry
Corrosion-resistant, safe filtration in the chemical industry.
Explore solutions
14
Cosmetics
Microbiological safety and precision filtration in cosmetics.
Explore solutions
15
Machinery
Precision and technical filtration in the machinery industry.
Explore solutions
16
Printing and Ink
Flawless color and print quality in printing and ink.
Explore solutions
17
Metal and Surface Treatment
Flawless surfaces and bath stability in metal and surface treatment.
Explore solutions
18
Forest Products
Resin and glue filtration in forest products and furniture.
Explore solutions
19
Automotive
Precision process filtration for zero defects in automotive manufacturing.
Explore solutions
20
Oil and Petrochemicals
Equipment protection and process safety in oil and petrochemicals.
Explore solutions
21
Plastic Packaging
Precision process filtration and raw material purity in plastic packaging.
Explore solutions
22
Plastic Injection Molding
Cooling and hydraulic filtration in plastic injection molding.
Explore solutions
23
Water and Environment
Recovery filtration in water and environmental technologies.
Explore solutions
24
Shipyards and Marine
Operational safety and efficiency in shipyards and marine.
Explore solutions
Alternative media for the same application
PTFE Teflon Bag Filter
Your Questions Answered
Frequently Asked Questions
At Prosestim, we are committed to answering your questions and providing technical support for our filtration solutions.
What is a PTFE (Teflon) bag filter?
What is the main difference between PPS and PTFE?
What is the difference between Nomex and PTFE?
What is the operating temperature limit?
Which cleaning systems is it compatible with?
Do you manufacture custom sizes?
PTFE Teflon Bag Filter RFQ Configurator
Configure your variation dimensions and technical specifications to receive an instant quote directly on WhatsApp and via email.