Dust Collector Bags: Comprehensive Guide to Optimal Filtration

Selecting the right filter media allows your system to achieve peak filtration efficiency, and we provide high-quality filter media and hardware compatible with all our dust collectors.

Our extensive media selection allows us to deliver solutions for virtually any application and accommodate any OEM-style baghouse, including:

• Pulse Jet and Reverse Air baghouse systems
• Corrosive gas streams
• Challenging particulates
• Nuisance collection or product recovery

Below is a detailed guide to help you choose the appropriate dust collector bags for your specific needs. If you have any questions or require assistance, our experts are ready to help.

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Types of Dust Collector Bags

1. Pulse Jet Bags

   • Ideal for dry dust applications
   • Operate at higher air-to-cloth ratios than shaker or reverse air collectors
   • Dust collects on the outside of the bag
   • Cleaned through a high pressure blast of compressed air
   • Typically made from non-woven materials unless used in high-temperature applications
   • Compatible with Pulsaire units with bags up to 26 feet in length

2. Pleated Bags for Pulse Jet Dust Collectors

   • MikroPul’s pleated bags offer solutions for issues like bottom bag abrasion, insufficient airflow, high pressure drop, and elevated emission rates.
   • Increase filtration area by 200-300%, reducing air-to-cloth ratios and allowing higher airflow.
   • Serve as direct replacements for traditional filter bags and cages
   • Benefits include reduced emissions, lower maintenance costs, improved dust release, and extended filter life

3. Reverse Air Bags

   • Suitable for large air volume applications such as wood and metal industries
   • Dust collects on the inside of the bags
   • Cleaned through a back flush or air and mechanical flexing of the bag fabric
   • Features off-line cleaning with bags that remain open during cleaning due to anti-collapse rings
   • Typically made from woven or lightweight non-woven filter bags

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Filter Bag Media Options

Selecting the right filter media for your dust collector bags is essential. Below are the available media types along with their properties:

1. Polypropylene

   • Max continuous operating temperature: 170°F
   • Excellent resistance to abrasion, moist heat, alkalis, and mineral acids
   • Ideal for applications with more than 15% oxygen content
   • Good energy absorption and filtration properties for effective cake release

2. Polyester

   • Max continuous operating temperature: 275°F
   • Excellent abrasion resistance and suitable for applications with high oxygen content
   • Good energy absorption and filtration properties
   • Fair resistance to alkalis and mineral acids
   • Not recommended for moist heat applications
   • Most commonly used due to strong resistance and stability
   • Offers flexibility with various fabric finishes

3. Acrylic

   • Max continuous operating temperature: 265°F
   • Good resistance to moist heat, abrasion, and mineral acids
   • Fair resistance to alkalis
   • Good energy absorption and filtration properties
   • More expensive than polyester and polypropylene

4. Fiberglass

   • Max continuous operating temperature: 500°F (can be higher with certain finishes).
   • Excellent for moist heat applications.
   • Fair resistance to abrasion and alkalis.
   • Poor resistance to mineral acids unless treated with acid-resistant finishes.
   • Sensitive to bag-to-cage fit due to applied finishes.
   • Fair energy absorption and filtration properties.

5. Aramid

   • Max continuous operating temperature: 375°F.
   • Excellent abrasion resistance.
   • Good resistance to moist heat and alkalis.
   • Fair resistance to mineral acids.
   • Good energy absorption and excellent filtration properties.

6. PPS (Polyphenylene Sulfide)

   • Max continuous operating temperature: 375°F.
   • Good abrasion resistance and excellent performance in moist heat, alkalis, and mineral acids.
   • Not recommended for applications with oxygen content above 15%.
   • Good energy absorption and excellent filtration properties.

7. P84 (Polyimide)

   • Max continuous operating temperature: 500°F.
   • Ideal for high-temperature applications like smelters, asphalt plants, and coal-fired boilers.
   • Excellent in high oxygen content environments.
   • Fair resistance to alkalis and good resistance to mineral acids and moist heat.
   • Fair performance in high abrasion applications.
   • Requires oversized bags for temperatures above 450°F due to shrinkage.

8. Teflon

   • Max continuous operating temperature: 500°F.
   • Most expensive option, used mainly in high-temperature applications.
   • Excellent resistance to moist heat, alkalis, mineral acids, and high oxygen content.
   • Good energy absorption and fair filtration properties.
   • Good performance in high abrasion applications.
   • Requires oversized bags for temperatures above 450°F due to shrinkage.

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Filter Bag Media Comparison Table

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Filter Bag Finishes

To enhance the performance of your dust collector bags, we offer various fabric finishes:

Non-Fiberglass Finishes

• Singe: Improves dust cake release. Available for felts made from Polyester, Polypropylene, Acrylic, Aramid, PPS, and P84.
• Glaze: Provides temporary dust cake release but may reduce airflow. Available for Polyester and Polypropylene felts.
• Silicone: Offers limited water repellency. Available for Polyester felts and woven fabrics.
• Flame Retardant: Reduces intensity of flammable substances (not flame-proof). Available for Polyester and Polypropylene felts and woven fabrics.
• Acrylic Coatings (Latex Base): Improves filtration efficiency and cake release but may impede flow in some applications. Available for Polyester and Acrylic felts.
• PTFE Surface Treatments and Laminates: Enhances fine particle capture, filtration efficiency, and cake release. Available for felts made from Aramid, Polyester, Acrylic, and Polypropylene. Laminates available in Polypropylene, PPS, Polyester, and PTFE.
• PTFE or Fluorocarbon Bath Treatments: Provides water and oil repellency with limited cake release. Available for Aramid felts, Polyester, Polypropylene, and PPS.
• ePTFE Membrane (Mikrotex): Offers fine particle capture, improved filtration efficiency, and cake release. Suitable for cement/lime kilns, incinerators, coal-fired boilers, cupola, and ferro/silica alloy furnaces.
• Acid Resistant: Improves acid resistance and water repellency. Available for Aramid felts.

Fiberglass Finishes

• ePTFE Membrane (Mikrotex): Provides fine particle capture, improved filtration efficiency, cake release, and increased airflow capacity. Ideal for cement/lime kilns, incinerators, coal-fired boilers, cupola, and ferro/silica alloy furnaces.
• Silicone, Graphite, and Teflon (Graf-O-Sil): Protects glass yarns from abrasion and adds lubricity. Used in non-acidic conditions, primarily in cement and metal foundry applications.
• Acid Resistant (Chemflex): Shields glass from acid attack. Applicable in coal-fired boilers, carbon black production, incinerators, cement manufacturing, and industrial or small municipal boiler applications.
• Teflon B (Tuflex): Enhances abrasion resistance and provides limited chemical resistance. Suitable for industrial and utility base load boilers under mild pH conditions.
• Chemical Resistant: Offers acid resistance, release properties, abrasion resistance, alkaline resistance, and improved fiber encapsulation. Used in coal-fired boilers (high and low sulfur) for peak load utilities, fluidized bed boilers, carbon black production, and incinerators.

Choosing the right dust collector bags and finishes is vital for the efficiency and longevity of your dust collection system. Whether dealing with high temperatures, abrasive materials, or corrosive environments, MikroPul has the expertise and product range to meet your needs. Contact our experts for personalized assistance in selecting the optimal filter bags for your application