PTFE Filter Bag
Darko’s PTFE membrane filter bags deliver ultra-high efficiency dust collection for cement plants, power stations, steel mills, and chemical processing. Engineered with 100% pure PTFE (Polytetrafluoroethylene) membrane, these high-temperature filter bags provide >99.99% filtration efficiency even for sub-micron particles (PM0.3-PM2.5), ensuring compliance with ISO 16890, EPA, and GB/T 6719 emission standards.
- Unmatched Chemical Resistance
- Extreme Temperature Tolerance
- Ultra-Low Adhesion Surface
- Zero Moisture Absorption
- Energy Saving
Industry-Leading PTFE Filter Bag Manufacturer
As a global leader in industrial dust filter bag manufacturing, DARKO brings over a decade of technical expertise to deliver ISO-certified high-performance filtration solutions to clients across cement, metallurgy, chemical, and grain processing industries in more than 30 countries. Our advanced PTFE membrane-coated filter bag series deliver 99.99% filtration efficiency, triple the lifespan of conventional products, and smart customization services – providing comprehensive industrial dust control solutions that combine superior filtration with energy efficiency.
Reliable Material Transportation Solutions
Excellent oxidation resistance at 190°C, ideal for coal-fired power plant FGD systems.
P84 filter bags operate at low pressure (<800Pa) and are rated for 240°C, making them ideal for sticky/wet dusts.
Polyester filter bags are cost-effective workhorse models suitable for temperatures below 130°C and offer efficiencies up to 99.5%.
- Technical Specifications
- PTFE vs. Standard Filter Bags (Performance Comparison)
- Top Applications
| Parameter | Specification |
|---|---|
| Material | 100% PTFE membrane laminated on fiberglass/PPS base |
| Filtration Accuracy | 0.1-1.0 μm (captures PM0.3 at 99.99% efficiency) |
| Max Temperature | 260°C continuous, 300°C short-term |
| Air Permeability | 2-8 CFM/ft² (optimized for pulse-jet systems) |
| Weight | 500-800 g/m² (customizable) |
| Bag Styles | Pulse-jet, reverse-air, shaker (round/flat) |
| Factor | PTFE Membrane Bags | Standard Polyester Bags |
|---|---|---|
| Filtration Efficiency | 99.99% @ 0.3μm | 99.5% @ 1.0μm |
| Chemical Resistance | Resists ALL chemicals | Degrades in acids/alkalis |
| Lifespan | 3-5 years | 1-2 years |
| Moisture Resistance | 100% hydrophobic | Absorbs moisture |
✔ Cement Industry – Kiln inlets/outlets, clinker coolers (reduces emissions to <10 mg/m³)
✔ Waste Incineration – Handles corrosive flue gases (HCL, SOx, NOx)
✔ Chemical Plants – Carbon black, titanium dioxide, sulfuric acid mist collection
✔ Power Generation – Coal-fired boiler fly ash filtration
✔ Metallurgy – EAF (Electric Arc Furnace) dust control
Key Advantages of PTFE Filter Bags
PTFE membrane filter bags deliver unparalleled performance through their unique polytetrafluoroethylene layer structure, achieving both ultra-high filtration precision (99.99% capture of 0.3-micron particles) and exceptional chemical stability—maintaining reliable operation even in extreme conditions up to 260°C (500°F) and under exposure to strong acids/alkalis (pH 0-14).
The microporous structure enables surface filtration, significantly improving dust capture efficiency while the non-stick surface provides self-cleaning properties, reducing pulse-jet energy consumption by 40% and extending service life to 3-5 years—far surpassing conventional depth filtration bags. These advantages make PTFE membrane bags the premium choice for high-temperature, high-corrosion applications like cement kiln exhausts and waste incineration, ensuring compliance with ultra-low emission standards (<10 mg/m³).
Related Products
Why Choose PTFE Filter Bags?
PTFE (Polytetrafluoroethylene) filter bags are the premium choice for demanding industrial applications where standard filter media fail. Here’s why leading plants worldwide rely on PTFE membrane technology:
1. Unmatched Filtration Efficiency
-
Captures 99.99% of particles down to 0.3 microns (PM0.3), exceeding ISO 16890 and EPA standards for ultra-low emissions (<10 mg/m³).
-
Surface filtration (vs. depth filtration) prevents particle penetration, maintaining high efficiency throughout the bag’s lifespan.
2. Extreme Environment Resistance
-
Temperature: Withstands continuous 260°C (500°F) and short-term 300°C (572°F)—ideal for cement kilns, incinerators, and metallurgy.
-
Chemical: Impervious to ALL acids, alkalis (pH 0-14), and solvents—unlike Nomex® or polyester that degrade.
-
Moisture: 100% hydrophobic—no performance loss in humid or wet gas streams (e.g., flue gas desulfurization).
3. Long-Term Cost Savings
-
3-5X longer lifespan vs. conventional bags (reducing replacement frequency and downtime).
-
40% lower energy costs due to low-pressure drop and efficient pulse-jet cleaning.
-
Zero maintenance—no chemical degradation, fiber shrinkage, or moisture-related clogging.
4. Critical Applications Where PTFE Excels
- Cement: Kiln inlets/outlets (handles alkali-laden gases).
- Waste-to-Energy: Corrosive flue gas (HCl, SOx) filtration.
- Chemicals: Titanium dioxide, carbon black, and sulfuric acid mist.
- Steel: Electric arc furnace (EAF) dust control.
5. Smart Investment Comparison
| Factor | PTFE Filter Bags | Standard Bags |
|---|---|---|
| Lifespan | 3-5 years | 1-2 years |
| Efficiency | 99.99% @ 0.3µm | 99% @ 1.0µm |
| Downtime | 50% less replacements | Frequent shutdowns |
| 5-Year Cost | Saves 35-50% | Higher total ownership |
Choose PTFE When:
✔ Your dust is fine (<1µm), sticky, or chemically aggressive.
✔ Your process involves high temperatures or moisture.
✔ You need to meet strict emission regulations.
✔ You prioritize long-term savings over upfront cost.
Darko’s PTFE Advantage:
- Custom porosity (0.2-3.0µm membranes) for your specific dust.
- Anti-static/Fireproof variants for explosive dust (ATEX compliant).
- Global support—engineers assist with selection, installation, and troubleshooting.
PTFE outperforms Nomex in chemical resistance (no oxidation) and moisture rejection—critical for cement kiln bypass gases.
Use pulse-jet systems (0.5-0.7 MPa). Never mechanically shake—PTFE is non-abrasive but delicate.
Yes! 5-year total cost is 40% lower due to 3X longer life + energy savings.