Aramid(Nomex) Dust Filter Bag
Aramid dust filter bags – often referred to in the market as Nomex® bags – are designed for medium to high temperature baghouses where polyester simply cannot cope anymore. The meta-aramid fibre has a tough aromatic backbone and holds its strength even when the gas stream sits in the 150–190°C range day after day. In real plants this means fewer bag failures, more predictable pressure drop and far less time spent changing filter elements during busy production periods.
At Omela Filtrations, we use aramid felt mainly in cement mills, asphalt mixing plants, lime and gypsum kilns, mineral dryers and selected metal processes where the gas is dry, the dust is abrasive and the owner wants a robust but still cost-effective solution.The bags can be supplied as pure aramid, aramid/PPS blends or with a PTFE membrane when lower emissions are required.
A carefully needle-punched aramid felt forms a stable dust cake and captures a wide spectrum of particle sizes. In cement mills, asphalt plants or mineral dryers this translates into clean stacks and steady emissions without the constant “tuning” some media require.
Meta-aramid keeps its strength where polyester has already “given up”. For baghouses running somewhere between 150 and 190 °C day in, day out, aramid is in its comfort zone and will hold its properties far longer than standard industrial felts.
Many of the duties where aramid shines are not gentle: coarse dust, fast gas velocities and strong pulses. The fibre structure and Omela’s bag construction handle this abuse well, reducing wear at cage contact points and keeping seams intact under repeated flexing.
When the gas is dry and the operating window is respected, aramid bags tend to run for years instead of seasons. Fewer change-outs mean less downtime, less labour on the baghouse floor and more time for the production team to focus on throughput instead of emergency maintenance.
Aramid sits in a very practical place on the cost curve. It is more capable than polyester or acrylic but does not reach the price level of P84 or PTFE. For many plants this is the sweet spot: enough temperature and strength headroom without paying for unnecessary ultra-high-end materials.
Each Omela aramid bag is matched to the cage design, air-to-cloth ratio and cleaning system of the actual baghouse. We check fibre batches, felt weight, permeability and seam strength so that what arrives at your site is not just “an aramid bag”, but a filter element tuned to your process.
| ITEM | OM–AR250N | OM–AR145N | OM–AR200P | OM–AR200N | OM–AR180N | OM–AR180P | OM–AR160N |
|---|---|---|---|---|---|---|---|
| Working temperature (°C) | 204 | 204 | 204 | 204 | 180 | 180 | 160 |
| Peak temperature (°C) | 250 | 250 | 250 | 240 | 220 | 220 | 200 |
| Emission (mg) | 10 | 20 | 20 | 20 | 20 | 20 | / |
| Weight (g/m²) | 500±5% | 450±5% | 450±5% | 450±5% | 450±5% | 450±5% | 600±5% |
| Thickness (mm) | 2.4±10% | 2.2±10% | 2.2±10% | 2.4±10% | 2.2±10% | 2.2±10% | 2.6±10% |
| Air permeability (m³/m²/min) | 20±20% | 22±20% | 22±20% | 26±20% | 24±20% | 20±20% | 22±20% |
| Tensile strength / warp | ≥900 | ≥900 | ≥900 | ≥900 | ≥900 | ≥900 | ≥900 |
| Tensile strength / weft | ≥1200 | ≥1200 | ≥1200 | ≥1200 | ≥1200 | ≥1200 | ≥1200 |
| Tensile elongation / warp | ≤25 | ≤25 | ≤25 | ≤25 | ≤25 | ≤25 | ≤25 |
| Tensile elongation / weft | ≤50 | ≤50 | ≤50 | ≤50 | ≤50 | ≤50 | ≤50 |
| 24–hour heat shrink / warp | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
| 24–hour heat shrink / weft | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
| Post–processing | Heat Setting / Singeing / Calendering | ||||||
Stable fine-particle capture in demanding medium–high temperature baghouse applications.
Better airflow stability than PPS and Fiberglass, helping to reduce fan energy consumption.
Omela aramid filter bags are at their best in dry, medium-high temperature processes with abrasive dust. Below are some of the applications where customers use them successfully year after year.
Raw mills, clinker coolers and cement grinding baghouses all place a lot of stress on filter media. Aramid offers the right blend of temperature capability and abrasion resistance to keep dust under control without constant bag replacements.
Hot aggregate dryers and asphalt mixing plants run with coarse, hot dust and frequent load changes. Aramid bags cope well with this mechanical stress while keeping emissions at the stack within permit levels.
Calcination and drying stages in lime, gypsum and mineral production often produce dry, abrasive dust streams. Here aramid’s mechanical strength pays off, helping baghouses stay online between planned shutdowns.
Choosing the right filtration supplier affects everything from system stability to maintenance downtime. At Omela Filtration, we combine reliable materials, controlled production, and years of industry experience to support dust and liquid filtration needs across different plants and applications.
We use consistent-grade filter media, sewing thread and metals sourced from qualified suppliers. Each batch is checked for weight, thickness, air permeability and tensile strength to keep performance steady across shipments.
Our facility is equipped with modern sewing lines, hot-welding machines and automated inspection tools. This keeps production efficient and helps us meet tight delivery schedules, even on custom orders.
Our engineers and technicians have long experience with dust collectors, liquid systems and industry-specific conditions. They help you match materials to temperature, chemistry and air-to-cloth ratios to avoid unnecessary failures.
From sampling to documentation and shipping, our team responds quickly and keeps information clear. Customers in cement, asphalt, power and water-treatment plants rely on our service to resolve problems without delay.
From the first technical discussion to installation and long-term maintenance, our team stays involved at every stage. We analyze your operating conditions, adjust product designs when needed, and ensure the final filtration setup works reliably in real plant environments. After delivery, our service team continues to provide guidance and troubleshooting support, helping you keep your system stable and downtime low.
With 20+ years of experience and 1000+ global clients, we deliver stable filtration performance and dependable dust-collector operation.
