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| Customization: | Available |
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| Material: | Polyester |
| Medium Material: | Microfiber |
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The dust filter bag is the "heart" of the bag filter, and its selection directly determines the effectiveness, cost, and lifespan of the dust removal system. The core of selection lies in "targeted treatment", that is, matching the most suitable filter bag according to specific working conditions.
The common specifications and sizes of dust removal bags generally include the following sizes: diameter: 120, 130, 133, 155, 180, 200, 250, 292, 300mm, etc; The lengths include: 1000, 1500, 2000, 2400, 25000, 2480, 2800, 3000, 3200, 3600, 4000, 4400, 5000, 6000, 8000mm, etc
The commonly used specifications for circular cloth bags include Φ 133 * 1000, Φ 133 * 1500, Φ 133 * 2000, Φ 133 * 2500, etc., with Φ 133 * 2000 being the most commonly used.
If you need filter bags of other sizes, please contact us for customization!
| Material Category | Primary Fiber | Continuous Operating Temp. (ºC) | Max. Instantaneous Temp. (ºC) | Key Characteristics & Typical Applications |
| Normal Temperature Class | Polyester (PET) | ≤ 130 | 150 | Best cost-performance ratio, most widely used. Good abrasion resistance. Better alkali resistance than acid resistance. Suitable for dry, normal-temperature powder recovery, e.g., cement, wood, grain processing. Susceptible to hydrolysis (rapid strength loss in high temp./high humidity environments). |
| Polypropylene (PP) | ≤ 90 | 100 | Excellent acid and alkali resistance, low cost. Very poor temperature resistance. Often used in chemical, fertilizer industries for acidic gas at normal temperatures. | |
| Medium Temperature Class | PPS (Polyphenylene Sulfide) | ≤ 160 | 190 | Outstanding acid and hydrolysis resistance. But not resistant to oxidation (use with caution when O2 > 10%). Primarily used in coal-fired boilers, waste incineration, and other acidic flue gas environments. |
| Aramid (Nomex) | ≤ 200 | 240 | Excellent temperature resistance and abrasion resistance. But not resistant to hydrolysis and sulfur oxides. Suitable for high-temperature environments without strong chemical corrosion, e.g., steel, cement. | |
| High Temperature Class | P84 (Polyimide) | ≤ 240 | 260 | Excellent high-temperature resistance. Large fiber surface area provides high filtration efficiency. Moderate acid resistance but not resistant to hydrolysis. Expensive. Commonly used in waste incineration, cement kiln inlets/outlets. |
| PTFE (Polytetrafluoroethylene) | ≤ 240 | 260 | "King of Plastics". Exceptional chemical stability, resistant to all acids, alkalis, and chemical corrosion. Very low friction coefficient, excellent dust release. Extremely expensive. Used in the most demanding chemical, waste incineration applications. | |
| Fiberglass | ≤ 260 | 280 | Highest temperature resistance, cost-effective. But poor abrasion resistance and flex fatigue. With special surface treatments, used in high-temperature flue gas applications in cement, steel, carbon black industries. | |
| Working Condition | Recommended Filter Media | Selection Rationale |
| Ambient Temperature, Dry, Non-Corrosive | Standard Polyester Needle Felt | Best cost-performance ratio, performance fully meets requirements. |
| High Flue Gas Moisture, Prone to Condensation | Membrane-Laminated Polyester or Water & Oil Repellent Treated Polyester | The PTFE membrane or repellent treatment effectively prevents moisture condensation causing bag blinding and clogging. |
| Coal-Fired Boiler, Acidic Flue Gas (e.g., SOx) | PPS Needle Felt, or PPS + PTFE Membrane | PPS offers excellent acid and hydrolysis resistance, ideal for this environment. The membrane enables ultra-low emissions. |
| Chemical Industry, Strongly Corrosive Gases | PTFE Membrane-Laminated Bags or Pure PTFE Bags | PTFE possesses unparalleled chemical stability, resisting almost all chemical corrosion. |
| Cement Kiln Inlet/Outlet, High Temperature | Fiberglass Filter Bags or P84 Filter Bags | Capable of withstanding flue gas temperatures above 260° long-term. |
| Combustible Dust (e.g., Coal Dust, Aluminum Powder) | Anti-Static Polyester/PPS Filter Media | Dissipates static electricity, eliminates explosion risks, and ensures operational safety. |
| Requirement for Ultra-Low Emissions (<10mg/m3) | Membrane-Laminated Filter Bags (Any Substrate) | Surface filtration technology is the most reliable method for achieving near-zero emissions. |
Polyester Needle Felt is the go-to solution for numerous industries, including:
Cement Industry: Raw mill, cement mill, packing plant, silo top & bottom.
Steel & Metallurgy: Sinter plant, blast furnace, material handling & transfer points.
Woodworking: Sanding, particleboard manufacturing, furniture production (wood dust).
Food & Pharmaceutical: Collection of flour, sugar, starch, and powder ingredients.
Chemicals & Plastics: Powder and pellet recovery
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