Reliable Nomex-based filter bags designed for continuous high-temperature industrial baghouse applications up to 204°C.
Aokai aramid filter bags provide stable performance in dry high-temperature gas streams with good abrasion resistance, making them widely used in cement, steel, asphalt, and other heavy industries.
Key Advantages
- Stable operation under high-temperature dry gas conditions
- Excellent abrasion resistance for heavy dust loading
- High Tensile Strength (Longer mechanical life)
- Flame resistance(Inherent safety in sparks).
- OEM custom size, top & bottom design for all baghouses
Learn About Aramid/Nomex Needle Felt
Aramid Filter Bag Technical Specification
| ITEM | CONEX145 | PRO845 | PRO545 | MAX445 |
|---|---|---|---|---|
| Working temperature (°C) | 204 | 204 | 204 | 180 |
| Peak temperature (°C) | 250 | 250 | 240 | 220 |
| Emission (mg) | 20 | 20 | 20 | 20 |
| Weight (g/㎡) | 450±5% | 450±5% | 450±5% | 450±5% |
| Thickness (mm) | 2.2±10% | 2.2±10% | 2.4±10% | 2.2±10% |
| Air permenability （m³/㎡/min @200Pa） | 22±20% | 22±20% | 26±20% | 24±20% |
| Tensile strength / warp（N/5cm） | >900 | >900 | >900 | >900 |
| Tensile strength / weft（N/5cm） | ≥1200 | ≥1200 | ≥1200 | ≥1200 |
| Tensile elongation / warp（%） | ≤25 | ≤25 | ≤25 | ≤25 |
| Tensile elongation / weft（%） | ≤50 | ≤50 | ≤50 | ≤50 |
| 24-hour heat shrink / warp（%） | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
| 24-hour heat shrink / weft（%） | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
Post-treatment:Heat Setting / Singeing / Glazing/Low Adhesion Treatment
*CONEX, PRO and MAX are Aokai internal product-grade designations.These grades are not universal industry standards. Final media selection is based on operating temperature, dust abrasiveness, gas chemistry, moisture, cleaning method and expected service life.
NOMEX Dust Collector Filter Bags(PRO845)
Envelope Filter Bag(MAX445)
Felt Filter Bag(MAX445)
Aramid filter bag(HPE250)
Flat type filter bag
Is Aramid Filter Media Right for Your Baghouse?
| Operating Condition | Recommended Direction |
|---|---|
| Stable high-temperature dust collection | Aramid / Meta-Aramid filter bags |
| Abrasive dust | Reinforced Aramid construction and optimized surface treatment |
| Sticky asphalt dust | Aramid with ePTFE membrane or low-adhesion finish |
| Static-sensitive dust | Anti-static Aramid option |
| High moisture, acid gas or complex chemistry | Technical review required before selection |
Advantages of Aramid Filter Bags
The Aramid Filter Bags low-emission series, designed specif-ically for asphalt mixing plants, utilizes high-qualityultra-fine materials and optimized needle punchingtechnology to provide you with a durable and effi-cient dust control solution, helping you achieve bothproduction and environmental standards!
Low Emission
Smaller pore size and even pore size distribution
allow flter bags to intercept fine dust particles and
achieve higher fltration efficiency.
Longer Lifespan
Compared to conventional material,it has superil
abrasion resistance(10-30% improvement), and
longer cleaning interval (5-25% improvement).
Energy Savings
The optimized air permeability and lower operating resistance of the filter media work together to effectively decrease energy consumption, thereby leading to significant reductions in operation costs.
Customized Design Solutions for Aramid Filter Bag
For high-temperature flue gases, corrosive environments, or heavy dust loads, AOKAI ENVIRONMENTAL designs and manufactures premium filter bags with optimized fiber selection, needle-punching, and advanced finishing—singeing, calendaring, heat setting, PTFE membrane lamination, and water & oil repellent treatment—for superior filtration efficiency, easier dust release, and longer service life.
We also offer fully customizable dimensions, shapes, and structures—including round, flat, and special-shaped bags—to fit any dust collection system, reduce airflow resistance, improve system stability, and enhance energy efficiency.
Post Treatment: Heat Setting /Singeing /Glazing /Dipping /PTFE Membraner/Water and Oil Proof /Anti-static/Low Adhesion
Seam Design：Double-stitched seams using high-temperature resistant threads.
Support Rings：Integrated support rings or other reinforcement structures to maintain bag shape and ensure optimal airflow.
Top and Bottom Configurations：Available in various designs, including snap band, ring top, and flange top for easy installation and secure fitting.
Need customized configurations for non-standard baghouses?
With a unique combination of thermal stability and mechanical toughness, our Nomex bags are the industry standard for asphalt plants, cement kilns, and steel smelting.
high heat and sticky dust that can clog filters
high-temperature metal dust and sparks
acidic flue gas and variable dust load
abrasive dust causing rapid wear
From Sample Analysis to Engineered Filter Solutions
Our Services
Step 1
Sample Analysis & Application Review
- Analyze fabric structure and material composition
- Review wear patterns, clogging or failure reasons
- Evaluate dust characteristics and operating conditions
Step 2
R&D & Material Engineering
- Needle felt material selection and optimization
- Fiber blend, weight and permeability design
- Surface treatments (PTFE membrane, singeing, glazing)
Step 3
Filter Bag & Cage Design
- Accurate size and construction
- Cage wire layout and surface finishing
- Compatible with pulse jet and cleaning systems
Step 4
Fast & Transparent Quotation
-
Material specification
-
Unit price & MOQ
-
Lead time and delivery terms
Step 5
Sampling & Confirmation
- Custom samples for testing
- Performance confirmation before mass production
- Adjustments based on test feedback
Step 6
Manufacturing, QC & Delivery
- All products are manufactured under strict quality control and shipped with export-ready packaging.
Ongoing technical support is available after delivery.
About Aokai
Aokai Environtec is a leading manufacturer of baghouse filter cloth, filter bags,filter cage. Founded in 2004 and headquartered in China, our products are used in a variety of applications and industries, including asphalt mixing plants, cement plants, mining operations, power generation plants, metallurgy industry, renewable energy industry, waste incineration plants, and other industrial facilities. Our mission is to make the world a cleaner and better place by protecting people, the planet, and production from the harmful effects of industrial processes.
Years of Serving Customers
㎡ – Modern Production Base
Customers Worldwide
Exporting Country
4,000,000 ㎡
Annual Filter Media Production
- Automatic Production Lines
- Oil & Water Repellency Treatment
- Heating Setting
- Singeing
- Calendering
- Lamination
3,000,000 pcs
Annual Filter Bag Production
- Automatic Multi-Task Production Lines
- Precision Sewing
- Heat Sealing
- Pinhole Sealing
- Seam Lamination
2,000,000 m
Annual Cage Production
- Filter Cages of All Shapes & Sizes
- Cage Treatments
- Silicone Coating
- Galvanizing
- Passivation (stainless steel)
500,000 m²
Smart Warehouse
HELP & SUPPORT
Aramid Filter Bags FAQ
Aramid filter bags are high-temperature dust collection bags designed for baghouse systems operating under demanding thermal and mechanical conditions. They are commonly used in asphalt mixing plants, cement production, metallurgy, chemical processing and other industrial dust collection applications where standard polyester media may not be suitable.
Meta-aramid filter bags are a common type of aramid filter media designed for elevated-temperature dust collection. In industrial filtration, “Aramid filter bags” is the broader category, while meta-aramid usually refers to a specific aramid fiber structure selected for its heat resistance, mechanical strength and dimensional stability.
Selected aramid filter bags can operate at up to 204°C continuously, while short-term peak temperature resistance depends on the fiber blend, filter media construction and actual gas conditions. Final media selection should also consider moisture, oxygen content, gas chemistry, dust abrasiveness and cleaning method.
Yes. Aramid filter bags are widely evaluated for asphalt mixing plants because they can provide reliable performance under elevated temperatures and abrasive dust conditions. For sticky asphalt dust or difficult cleaning conditions, an ePTFE membrane, low-adhesion finish or reinforced construction may be recommended.
Yes. A professional aramid filter bag manufacturer can produce replacement bags according to your existing bag sample, technical drawing or size information. To prepare an accurate recommendation and quotation, it is helpful to provide bag diameter, length, quantity, top and bottom construction, operating temperature, dust type and cleaning method.
The right meta-aramid filter bags should be selected based on actual operating conditions rather than temperature alone. Important factors include continuous and peak temperature, dust abrasiveness, moisture, acid gas, oxygen content, pulse-cleaning pressure, bag size and expected service life. A technical review is recommended for demanding or complex applications.
Contact Us
*All information will be kept confidential.
Explore Related Filter Bag Solutions
Not sure whether Aramid is the best choice for your operating conditions? Explore alternative filter media or send us your existing bag details for a technical recommendation.
PTFE Filter Bags
For higher-temperature or chemically demanding dust collection applications, PTFE filter bags may be a more suitable option. Our team can compare PTFE and Aramid based on your actual gas conditions, temperature and dust characteristics.
Polyester Filter Bags
For sulfur-containing gas streams or acid-gas-related applications, PPS filter bags may be considered after reviewing oxygen content, operating temperature, moisture and cleaning conditions.
Need a non-standard bag diameter, length, snap band, cuff, bottom design or seam construction? Send us your drawing, existing sample or bag photo for a custom replacement recommendation.
