PTFE Filter Bags for the Most Chemically Aggressive Dust Collection
Skytech Ultrafab PTFE (Teflon) Filter Bags offer unmatched resistance to virtually all acids, alkalis, solvents, and oxidising agents — combined with a continuous service temperature of 260°C. The non-stick PTFE surface minimises dust adhesion, enabling clean and efficient pulse-jet regeneration even with hygroscopic and sticky dusts in waste incineration, chemical, pharmaceutical, and glass industries.
What Are PTFE Filter Bags?
PTFE Filter Bags are needle-punched felt filter bags where the fibre itself is 100% polytetrafluoroethylene (PTFE), commonly known as Teflon. PTFE fibre is inherently chemically inert and thermally stable, making these bags the material of choice wherever conventional synthetic fibres would be chemically degraded or thermally damaged.
Features and Benefits
- Ultimate Chemical Resistance: PTFE fibre resists virtually all acids, alkalis, organic and inorganic solvents, and oxidising agents including HF, H₂SO₄, Cl₂, and HNO₃
- 260°C Continuous Service: Maintains full mechanical strength and filtration efficiency at continuous operating temperatures of 260°C (short-term peaks to 280°C)
- Non-Stick Surface: Inherent PTFE non-stick property ensures dust cake drops cleanly from the bag surface with each cleaning pulse
- Hydrolysis Resistance: Unlike nylon or polyester, PTFE is completely immune to steam hydrolysis — ideal for wet scrubber outlet gas conditions
- Low Pressure Drop: Smooth fibre surface provides lower air resistance at equivalent filtration efficiency, reducing fan energy consumption
- Sub-Micron Efficiency: ePTFE membrane lamination option achieves >99.99% efficiency on particles below 1 µm for stringent emission standards
Technical Specifications
| Parameter | Details |
|---|---|
| Fibre Material | 100% PTFE (Teflon) |
| Fabric Weight | 700 – 900 g/m² |
| Continuous Temperature | 260°C |
| Peak Temperature | 280°C (short-term) |
| Chemical Resistance | Excellent vs all acids, alkalis, oxidants, solvents |
| pH Range | 0 – 14 (all pH conditions) |
| Hydrolysis Resistance | Complete immunity — suitable for wet conditions |
| Surface Treatment | Standard, Singed, Calendered, ePTFE Membrane |
| Cleaning Mechanism | Pulse Jet, Reverse Air, Shaker |
Applications
- Waste Incineration: Municipal and industrial waste incineration flue gas filtration — handles acid gases, dioxins, and sticky fly ash
- Chemical Manufacturing: HF, HCl, and H₂SO₄ acid mist collection and sub-micron chemical dust capture in acidic environments
- Pharmaceutical: Potent compound and API dust collection requiring chemically inert, non-contaminating filter media
- Glass Manufacturing: High-temperature glass fibre and batch dust collection with fluoride and alkali containing fume streams
- Secondary Aluminium: Dross processing and aluminium recycling fume collection at high temperatures with chloride contamination
Why Choose Skytech Ultrafab for PTFE (Teflon) Filter Bags?
- Genuine PTFE Fibre: Only pure PTFE fibre used — not blended or coated alternatives — ensuring the full chemical and thermal specification is met
- ePTFE Membrane Lamination: In-house lamination capability to bond ePTFE membrane for sub-micron absolute filtration on the most demanding emission permits
- Certified Performance: Air permeability, tensile strength, and thermal stability test reports supplied with every order
- Long Service Life: PTFE bags routinely achieve 3–5 year service intervals in challenging waste incineration and chemical plant applications
- Global Standards: Manufactured to meet EU Industrial Emissions Directive (IED) and Indian Environment Protection Act emission limit requirements
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