Dust Collector Filter Bags FAQ
1.General Questions about Dust Collector Bags
A dust collector filter bag is a cylindrical or flat fabric element used inside a baghouse or dust collection system to capture fine dust and particulate matter from industrial air. Sffiltech dust collector filter bag is very popular of customer. You can come to www.sffiltech.com
Dirty gas enters the filter housing and passes through the fabric. Dust particles remain on the bag surface while clean air exits through the fabric. Periodic cleaning (pulse-jet, reverse-air, or shaker) removes the accumulated dust cake.
Our filter bag are used in cement plants, steel mills, power generation, asphalt mixing, chemical processing, mining, and food production.
2.Filter Bag Materials and Construction
Our dust collecotr filter bag typically with the following filter media:
Sffiltech needle felt (nonwoven) has a three-dimensional pore structure with higher filtration efficiency and lower pressure drop, while woven fabric has a regular pattern and lower cost. So we usually make choice for our customers with their working condition.
Our machine can do the treatment like:singeing, calendaring, heat setting, water-oil repellent, antistatic, PTFE coating, or PTFE membrane lamination to improve dust release and extend bag life.
3.Design and Technical Parameters
Sffiltech can make different size of filter bag, but our common diameters: 120mm, 130mm, 150mm, 160mm, 180mm, 200mm; lengths vary from 2 to 8 meters.
It’s the volume of air (m³/min) passing through one square meter of fabric area.
Lower A/C ratios improve efficiency and bag life.
Standard efficiency: 99% for particles >1 µm.
PTFE membrane bags can achieve 99.99% efficiency.
Normal we will suggest customer the operating pressure drop is 1000–1500 Pa. Higher pressure indicates clogging or need for cleaning.
4.Filter Bag Types and Top/Bottom Designs
We can make Snap band, raw edge, corded cuff, collar, or beaded cuff .
Sffiltech typically use the flat sewn, disc bottom, welded bottom, or beaded cuff.
Yes. Custom-made bags can replace OEMs like Donaldson®, Mikropul®, Nederman®, or Camfil®.
5.Operation, Cleaning, and Maintenance
Typically we suggest our customer to change the filter bag every 12–24 months, depending on the dust type, temperature, and cleaning efficiency.
Sffiltech filter bag will think how to extend filter bag life once we confirm orders with customers. But some topic for these choice:
6.Troubleshooting & Performance Issues
Some customer come to us as they met such problem,typically it happened as possible causes: high moisture, sticky dust, insufficient cleaning, or wrong filter material.
We will suggest customer to check for leaks, improper sealing, damaged cages, or wrong installation direction.
Some new customer come to us as their filter bag tearing caused by abrasion, excessive temperature, or mechanical stress.
7.Installation and Compatibility
We have Manuel for our customers, in a simple it will be ensure proper alignment, avoid twisting, and inspect the snap band seal.
Together our filter cages production standards will be smooth, straight, and free from weld burrs. Then it make sure right installation for filter bags and cages.
A venturi is a nozzle installed at the top of the cage to improve air pulse distribution for effective cleaning.
Yes, it is very necessary for some plant as it will be very dangerous without anti-static especial in explosive or flammable dust environments such as coal, aluminum, or grain.
8.Quality, Certification & Standards
Yes, our manufacturing follows ISO 9001:2015, and emissions comply with EPA and EU dust emission standards (<20 mg/Nm³ possible) with our own technical data.
Yes, we can supply air permeability, tensile strength, and temperature resistance test data upon request.we will send to customer with quotation for filter bag or filter media.
9.Packaging, Delivery & Service
Sffiltech filter bags are sealed in a PE bag and packed in cartons or woven bags with moisture protection.
Our standard production time is 7–15 days, depending on quantity and material.our delivery time can be adjust as customer needed. We can make 4000pcs filter bag one day, so our customer always happy with our delivery time.
Yes, free samples are available for testing (customer only need to afford the shipping cost only).
Yes,Our OEM & ODM services include custom logo, tag, and packaging design.
10.Technical Comparison & Advanced Topics
| Filter Media | Continuous Operating Temperature | Peak Temperature | Key Features & Applications |
|---|---|---|---|
| Polyester (PE) | 130 °C / 266 °F | 150 °C / 302 °F | Most widely used material. Excellent mechanical strength and abrasion resistance. Suitable for general dust collection in cement, woodworking, and grain industries. |
| Acrylic (AC) | 125 °C / 257 °F | 140 °C / 284 °F | Good resistance to hydrolysis and chemical corrosion. Commonly used in flue gas with medium acidity or moisture. |
| Aramid (Nomex) | 200 °C / 392 °F | 220 °C / 428 °F | High temperature and chemical resistance. Ideal for asphalt, steel, and power plant applications. |
| PPS (Polyphenylene Sulfide) | 160 °C / 320 °F | 190 °C / 374 °F | Excellent resistance to acid, alkali, and hydrolysis. Widely used in coal-fired boilers, incinerators, and dust from sulfur-containing gases. |
| PTFE (Polytetrafluoroethylene) | 240 °C / 464 °F | 260 °C / 500 °F | Premium performance material. Outstanding chemical resistance and non-stick surface; used in aggressive and corrosive environments. |
| P84 (Polyimide) | 240 °C / 464 °F | 260 °C / 500 °F | Excellent temperature stability and filtration efficiency; used in high-temperature gas filtration and energy industries. |
| Fiberglass (FG) | 260 °C / 500 °F | 280 °C / 536 °F | Very high temperature resistance, good dimensional stability. Suitable for cement kilns, power plants, and metallurgical furnaces. |
| Blended Media (PE+PTFE, PPS+PTFE, etc.) | Varies by composition | — | Enhanced performance through PTFE membrane or blending to improve efficiency, lifespan, and chemical resistance. |
11.Others
Yes, we can. We've been providing cleanroom solutions for more than 20 years.
Yes, But due to the dimension and weight of product, we have to charge a reasonable fee. and delivery time is 3-7 working days.
500~1000 pcs: 15-20 working days; 1000~5000 pcs: 20-25 working days; Over 5000 pcs: about 30 working days.
Yes, our materials are environment-friendly.
Our cleanroom project units had passed ISO14644-1 and CE We will make samples before mass production, and after sample approved, we will begin mass production. Doing 100% inspection during production; then do random inspection before packing; taking pictures after packing for you.