Polyester Filter Bag
Polyester filter bags offer durable, cost-effective dust collection for temperatures up to 140°C, featuring high airflow, low resistance, and excellent abrasion resistance for industries like steel, cement, and wood processing.
- High Mechanical Strength
- Excellent Thermal Stability
- Low Moisture Absorption & Hydrolysis Resistance
- Cost-Effective Filtration
- Reliable Chemical Resistance
- Superior Electrical Insulation
Industry-Leading Polyester Filter Bag Manufacturer
As a global leader in industrial filtration solutions, DARKO leverages over a decade of expertise to deliver ISO-certified polyester filter bags to clients across cement, wood processing, food manufacturing, and general industries in 30+ countries. Our advanced PET needle felt filter bags provide 99.9% filtration efficiency for dry dust, offer 50% higher abrasion resistance than standard fabrics, and feature customizable designs – delivering cost-effective dust control that balances durability with energy efficiency.
Reliable Material Transportation Solutions
Ultimate chemical resistance (handles all acids/alkalis) with 260°C continuous operation.
Low-pressure operation (<800Pa) with 240°C rating, perfect for sticky/humid dust.
Excellent oxidation resistance at 190°C, ideal for coal-fired power plant FGD systems.
- Technical Specifications
- Key Advantages
- Top Applications
| Parameter | Specification |
|---|---|
| Material | 100% PET needle felt (550-600 g/m²) |
| Filtration Efficiency | 99.9% @ 1.0μm (per ISO 16890) |
| Max Temperature | 140°C continuous / 170°C peak (30 mins) |
| Air Permeability | 12-15 CFM/ft² (@125Pa) |
| Chemical Resistance | Stable in pH 4-9 (avoid strong acids/alkalis) |
| Bag Styles | Pulse-jet (round), shaker (flat), reverse-air |
✔ High Mechanical Strength – 50% more abrasion-resistant than standard fabrics, enduring 500,000+ pulse cycles
✔ Thermal Stability – Withstands 140°C continuous and 170°C short-term exposure without strength loss
✔ Low Moisture Absorption – <0.4% moisture uptake (RH 65%), preventing clogging in dry environments
✔ Energy Efficient – 12-15 CFM/ft² air permeability reduces system fan power by 10-15%
✔ Cost-Effective – 40% lower upfront cost vs. Nomex® or PPS, with 18-24 month lifespan in moderate conditions
✔ Customizable – Available with anti-static, water-repellent, or fire-retardant treatments
✔ Cement Industry – Raw mill, cement mill, and packing plant dust collection
✔ Wood Processing – Sawdust, MDF, and particleboard sanding operations
✔ Food & Pharma – Flour, sugar, starch, and powder handling (FDA-compliant options)
✔ Metalworking – Grinding, polishing, and welding fume extraction
✔ General Manufacturing – Non-corrosive dust from plastics, textiles, etc.
Polyester Filter Bags: The Powerhouse of Filtration
Polyester (PET) filter bags provide efficient filtration within the 125-140°C range, featuring high air volume, low resistance, abrasion resistance, and high strength, with short-term tolerance up to 170°C—making them an optimal choice for steel, cement, wood processing, and similar industries.
These bags offer excellent electrical insulation and resistance to weak acids/organic solvents, but should be protected from concentrated sulfuric acid, strong alkalis, and sustained high heat/humidity to avoid performance degradation. Their low moisture absorption (<0.4% RH) further ensures long-term operational stability.
Related Products
What Is a Polyester Filter Bag Used For?
Polyester filter bags are widely used in:
✓ Heavy Industries
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Steel plants (EAF dust, sinter fumes)
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Cement production (raw/cement mills)
✓ Manufacturing
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Wood processing (sawdust collection)
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Metalworking (grinding/polishing)
✓ Food & Pharma
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Flour/sugar processing (FDA-compliant options available)
Avoid using with:
✖ Strong acids (e.g., sulfuric/nitric acid)
✖ High alkali environments (pH >10)
✖ Continuous high-humidity >120°C
(Technical Tip: For harsher conditions, consider PPS or PTFE filter bags instead)
Polyester (PET) filter bags can operate continuously at 125-140°C (257-284°F), with short-term exposure up to 170°C (338°F). Beyond this range, the fibers may weaken or degrade.
While polyester has low moisture absorption (<0.4% RH), prolonged exposure to high humidity + temperatures >120°C can cause hydrolysis. For damp conditions, consider PTFE-coated polyester or PPS bags.
Polyester resists weak acids and organic solvents but degrades in:
-
Strong acids: Concentrated sulfuric/nitric acid
-
Strong alkalis: pH >10 solutions
For chemical-heavy processes, upgrade to PPS or PTFE bags.