FMS Composite Needle Punched Felt Filter Bag
FMS composite needle punched felt filter bags from LYH fit cement kiln heads and tails, steel sintering plants, blast furnace gas cleaning, non-ferrous smelting, and the most thermally and mechanically demanding high-temperature flue gas applications. Buyers choose FMS filter bags when they need sustained service up to 200 °C with short-term peaks to 280 °C, exceptional acid and alkali resistance, and the proven economics of fiberglass combined with the flex and abrasion durability of high-temperature synthetic fibers.
We supply FMS / Fumeisi composite filter bags from China with custom size discussion, fabric weight options (~800 GSM standard, customizable), and full surface treatment support including PTFE / silicone / graphite three-proof finish. If your project requires a specific bag diameter, length, top/bottom construction, or composite formulation match for cement kiln, sinter plant, or blast furnace duty, we can review the RFQ and pair the right FMS composite to your dust collector.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Material | Alkali-free chopped fiberglass yarn blended with high-temperature fibers (P84 / aramid / PPS) — needle-punched composite felt |
| Standard Construction | Fiberglass scrim + high-temp fiber batt, needle-punched, PTFE/silicone/graphite finished |
| Continuous Operating Temperature (Long-Term) | 100–200 °C / 212–392 °F |
| Maximum Short-Term Surge Temperature | 260–280 °C / 500–536 °F |
| Specific Density | ≈ 1.8–2.0 g/cm³ |
| Moisture Regain (20 °C, 65% RH) | 0–0.5% |
| Standard Fabric Weight | ≈ 800 GSM (typical), 750 / 850 GSM customizable |
| Air Permeability | 8–14 m³/m²/min @ 200 Pa |
| Tensile Strength (Warp / Weft) | ≥ 1,500 N / 5×20 cm |
| Filtration Efficiency | ≥ 99.9% (with ePTFE membrane: ≥ 99.99%) |
| Combustibility | Non-flammable / Self-extinguishing |
| Standard Surface Finish | PTFE / silicone / graphite “3-proof” finish (water-, oil-, and acid-resistant) |
Material Properties
Composite Construction Combining Fiberglass with High-Temperature Synthetic Fibers — FMS (also known by its Chinese trade name “Fumeisi” / 氟美斯) blends alkali-free chopped fiberglass yarn with P84, aramid, or PPS high-temperature fibers in a needle-punched felt structure. The fiberglass component provides thermal stability and dimensional integrity; the synthetic fiber component overcomes fiberglass’s brittleness, dramatically improving flex life and abrasion resistance.
Solves Pure Fiberglass’s Brittleness Problem — Pure woven fiberglass fabric is thermally robust but mechanically fragile — pulse-cleaning frequency must be limited and bag handling requires special care. FMS composite preserves fiberglass’s thermal performance while delivering 3–5× better flex life and abrasion resistance than pure fiberglass — making it suitable for demanding pulse-jet baghouses where pure fiberglass would fail prematurely.
Excellent Acid & Alkali Resistance — The combined fibers and PTFE/silicone/graphite “3-proof” surface finish deliver outstanding resistance to acid dew point conditions, sulfur-rich flue gas, and moderate alkali exposure. Particularly effective in cement kiln and sinter plant applications where acid attack and abrasive dust coexist.
Surface Treatment Provides Water and Oil Repellency — The standard 3-proof finish (PTFE + silicone + graphite) provides water and oil repellency, dramatically reducing dust caking and bag blinding in moist or oily flue gas conditions. Self-lubricating graphite improves cake release during pulse cleaning.
Stable Long-Term Performance with Short-Term Thermal Tolerance — Long-term operating temperature 100–200 °C is bounded by the synthetic fiber component (P84 / aramid / PPS), but instantaneous peaks tolerate up to 260–280 °C thanks to the fiberglass core — providing critical thermal headroom during process upsets and startup transients.
Cost-Effective Premium Solution — While more expensive than pure PPS or aramid, FMS composite delivers significantly longer service life and lower replacement frequency in cement and steel applications. For cement kiln tail and sinter plant duty, FMS composite is widely accepted as the best total lifecycle cost among needle-felt media options.
Limitations to Note — FMS composite operating temperature is bounded by the synthetic fiber component; continuous service does not reach pure woven fiberglass’s 260 °C limit. For applications above 200 °C continuous, choose PTFE-finished woven fiberglass or pure PTFE filter bags. FMS is also less suitable than pure PTFE for highly oxidizing or HF-containing flue gas.
Available Surface Treatments
| Treatment | Function | Recommended For |
|---|---|---|
| PTFE / Silicone / Graphite Finish (Standard 3-Proof) | Standard finish: water-, oil-, and acid-resistant; dramatically improves abrasion and flex life | Standard cement, steel sintering, smelting |
| PTFE Impregnation | Concentrated PTFE bath increases chemical resistance and lubricity over standard 3-proof | Acid-rich flue gas, high-chemistry applications |
| ePTFE Membrane Lamination | Microporous expanded-PTFE membrane on dust side; emissions ≤ 5 mg/Nm³, surface filtration | Ultra-low emission compliance, fine PM2.5 capture |
| Anti-Static | Conductive carbon fiber or stainless-steel filament; surface resistance 10³–10⁸ Ω·cm | Combustible dust in cement alternative fuel, biomass, MSW |
| Heat Setting | Stabilizes composite dimensions, eliminates shrinkage | All applications |
Bag Construction
- Top Constructions — Snap band, flange top, ring top, soft cuff, raw edge, strap top
- Bottom Constructions — Disc bottom, flat bottom, reinforced double-bottom, wear-strip bottom
- Sewing — 3-needle chain stitch with PTFE thread (mandatory for high-temperature FMS); fiberglass thread for extreme temperatures; overlock or lockstitch on bottoms
- Reinforcement — Optional wear strips and double-bottom reinforcement strongly recommended for cement kiln tail and sinter plant duty due to abrasive dust loading
- Composite Customization — Synthetic fiber type (P84 / aramid / PPS) selectable based on flue gas chemistry and temperature requirements
Standard Sizes & Customization
| Dimension | Range |
|---|---|
| Diameter | Φ100 / 120 / 125 / 130 / 150 / 160 / 180 / 250 mm (or custom) |
| Length | 1,000 – 10,000 mm (longer lengths supported by the fiberglass core’s load tolerance) |
| Tolerance | Diameter ± 2 mm, Length ± 5 mm |
Non-standard sizes, special top/bottom configurations, and OEM patterns produced from your drawings or sample bag.
Industry Applications
- Cement Kiln Head & Tail — kiln main exhaust dedusting at 150–200 °C with abrasive cement dust — the largest global application of FMS composite filter bags
- Steel Sintering Plants — sinter plant main exhaust with combined high temperature, abrasive iron-rich dust, and SOx
- Blast Furnace Gas Cleaning — top-pressure recovery turbine (TRT) inlet, blast furnace gas dedusting
- Non-Ferrous Smelting — copper, lead, zinc, aluminum smelting exhaust with elevated SOx and metal vapor
- Iron & Steel Secondary Dedusting — EAF, ladle refining, hot-metal pretreatment, secondary fume capture
- Carbon Black Production — process tail gas at sustained high temperature with abrasive dust
- Power Plants — High-Temperature Zones — coal-fired and biomass economizer outlet, fly-ash transport
- Asphalt Mixing — Heavy Duty — premium drum dryer applications requiring extended bag life
- Lime & Gypsum Plants — kiln exhaust dedusting at elevated temperature
- Glass Manufacturing — secondary furnace exhaust with combined thermal and chemical loading
Why Choose LYH FMS Composite Filter Bags
- Premium alkali-free fiberglass + high-temperature synthetic fibers — sourced from leading global producers; uniform composite construction
- Customizable synthetic fiber selection — P84, aramid (Nomex), or PPS blend based on application requirements
- Standard PTFE/silicone/graphite 3-proof finish — applied to every FMS bag, providing water, oil, and acid resistance
- Strict QC on fabric weight, air permeability, tensile strength, finish uniformity, composite consistency
- Full customization — any size, any composite formulation, any top/bottom, any treatment combination
- Engineered for cement & steel duty — proven configurations for kiln tail, sinter plants, blast furnace gas
- High-temperature sewing — all seams use PTFE thread for thermal compatibility
- Fast lead time — standard sizes ship in 15–25 days
- Engineering support — application engineers help select fiber blend, finish, and construction based on your gas temperature, chemistry, and dust loading
- Reliable logistics — individually wrapped, ring-up packing, sea / air / courier shipment worldwide
FAQ
Q1: What does “FMS” mean and why is it called Fumeisi? “FMS” stands for Fiberglass + Multi-fiber Synthetic composite — also known by its Chinese industry name “Fumeisi” (氟美斯), derived from the Mandarin pronunciation. It refers to a needle-punched composite felt that blends alkali-free chopped fiberglass yarn with high-temperature synthetic fibers (P84, aramid, or PPS), finished with PTFE/silicone/graphite “3-proof” surface treatment. FMS is widely deployed in Chinese and Asian cement and steel industries; the same composite is sold internationally as “fiberglass-aramid composite” or “fiberglass-P84 composite” felt.
Q2: What is the maximum operating temperature of FMS filter bags? FMS composite filter bags operate continuously at 100–200 °C long-term, with short-term peaks up to 260–280 °C. The continuous limit is bounded by the synthetic fiber component (P84 / aramid / PPS); the fiberglass core provides thermal headroom during process upsets. For continuous operation above 200 °C, choose PTFE-finished woven fiberglass or pure PTFE filter bags.
Q3: Why choose FMS composite over pure woven fiberglass? Pure woven fiberglass tolerates higher continuous temperature (260 °C) but is mechanically brittle — limited flex life, low abrasion resistance, requires careful handling. FMS composite delivers 3–5× better flex life and significantly better abrasion resistance, making it suitable for high-frequency pulse-jet baghouses and abrasive dust streams (cement, sintering) where pure fiberglass would fail prematurely. FMS trades some peak temperature for dramatically better mechanical durability.
Q4: Why choose FMS composite over pure aramid (Nomex)? Aramid offers continuous service at 204 °C dry — comparable to FMS — but is mechanically more flexible and easier to handle. FMS advantages over aramid: (1) higher short-term peak tolerance (280 °C vs 240 °C), (2) better acid resistance due to fiberglass core, (3) stronger dimensional stability under thermal cycling, (4) longer service life in abrasive dust. Aramid advantages over FMS: (1) easier to handle / install, (2) more cost-effective for moderate duty.
Q5: What synthetic fiber should I specify in the FMS composite?
- FMS with P84 — best fine-particle capture (multi-lobal fiber), preferred for premium emission compliance
- FMS with Aramid (Nomex) — best mechanical strength and abrasion resistance, preferred for sintering and blast furnace
- FMS with PPS — best acid and hydrolysis resistance, preferred for cement kiln tail with high SOx
LYH application engineers can recommend the optimal blend based on your specific flue gas chemistry, temperature, and dust characteristics.
Q6: When should I specify ePTFE membrane on FMS bags? ePTFE membrane lamination is recommended when emission targets are below 10 mg/Nm³, when fine PM2.5 capture is required, or when dust is sticky/condensable. FMS + ePTFE is widely used in modern cement plants and sinter plants for ultra-low emission compliance — combining FMS’s thermal/mechanical durability with ePTFE’s surface filtration efficiency.
Q7: What is the typical service life of FMS composite filter bags? In typical cement kiln tail applications, FMS composite filter bags deliver 3–5 years of service life. With ePTFE membrane lamination and proper application matching, service life can extend to 5–7 years. Service life depends heavily on dust abrasiveness, pulse-cleaning frequency, and process upset frequency.
Q8: Is FMS suitable for combustible dust applications? Yes — anti-static FMS composite with conductive carbon fiber or stainless-steel filament is available for cement alternative fuel co-processing, biomass, MSW incineration, and other combustible-dust applications at elevated temperature. Surface resistance is controlled to 10³–10⁸ Ω·cm.
Q9: What information do I need to provide for a quote? (1) bag dimensions, (2) top/bottom construction, (3) operating temperature & humidity, (4) flue gas composition (SOx, NOx, alkali, halogens), (5) dust type & abrasiveness, (6) preferred synthetic fiber blend if known, (7) emission requirement, (8) quantity. A drawing or sample bag is even better.
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