Treated Fiberglass Felt for Cement Kilns | PTFE Membrane- Omela Filtration

Q: What operating temperature can Fiberglass Needle Felt withstand?

Fiberglass Needle Felt is designed for continuous operation around 230 °C , with the ability to handle instant temperature peaks up to 250 °C depending on system conditions and surface treatments such as PTFE impregnation. Its inorganic fiber structure provides excellent dimensional stability at elevated temperatures.

Q: In which industries is Fiberglass Needle Felt most commonly used?

It is widely used in high-temperature and chemically aggressive environments , including: Cement kilns, clinker coolers, and lime processing Metallurgical furnaces and smelting operations Waste-to-energy incineration systems Coal / coke-fired boilers Chemical and petrochemical process gas filtration These industries benefit from fiberglass felt’s thermal resistance, chemical stability, and abrasion durability .

Q: How does Fiberglass Needle Felt perform in corrosive flue-gas environments?

Fiberglass felt offers excellent resistance to acidic and alkaline gases , including SO₂, SO₃, HCl, HF, and other aggressive components commonly found in cement, metallurgy, and incineration processes. Surface treatments such as PTFE impregnation or PTFE membrane further enhance chemical resistance and dust release.

Q: What factors should be evaluated before selecting Fiberglass Needle Felt for a filtration system?

Omela recommends assessing: Continuous and peak operating temperature Chemical composition of the gas stream Moisture content and acid-dew-point risk Dust-loading level and particle abrasiveness Required air-to-cloth ratio and filtration efficiency Compatibility with existing cage designs and cleaning systems A proper pre-project evaluation ensures maximum service life and filtration performance .

Q: Can Fiberglass Needle Felt be customized for different applications?

Yes. Omela provides extensive customization options, including: Felt weight, thickness, fiber diameter, and permeability Scrim reinforcement or multi-layer structures Surface treatments such as PTFE coating, PTFE membrane, singed or calendared finishes Custom filter-bag construction (top/bottom configurations, sewn or welded seams) Engineering support to match plant-specific thermal, chemical, and dust-loading demands

Q: How does fiberglass compare to PPS, P84, or other organic felts?

Fiberglass needle felt is superior when: Temperatures exceed 200 °C The gas stream is acidic, alkaline, or chemically unstable Dust is highly abrasive Lowest shrinkage and longest bag life are required However, fiberglass has lower flex-fatigue resistance than organic felts, so proper cage design and pulse-jet tuning are important.

Fiberglass Needle-Punched Felt

Fiberglass Needle-Punched Felt Overview

Fiberglass Needle Felt is a high-temperature, chemically inert, and dimensionally stable non-woven filtration media designed for harsh industrial dust and gas environments. It provides reliable performance where organic felts fail, especially under extreme heat and corrosive flue-gas conditions.

Key Performance Advantages

Extreme heat resistance suitable for continuous high-temperature operation.
Excellent chemical stability against acids, alkalis, solvents, and corrosive gases.
High abrasion resistance ideal for mineral, cement, clinker, and metal dust.
Long service life due to its inorganic fiber structure.
Stable airflow with consistent dust-capture efficiency.

Typical Industrial Applications

Metal smelting and metallurgical furnaces
Cement kilns, preheaters, and clinker coolers
Coal, coke, and high-temperature combustion systems
Waste-to-energy (WtE) incineration plants
Chemical and petrochemical processing

When selecting Fiberglass Needle Felt, key considerations include operating temperature range, chemical exposure level (acids, alkalis, SO₂, NOₓ), dust abrasiveness, airflow requirements, and expected maintenance interval.

Key Performance Benefits

High Temperature Resistance

Withstands continuous high-temperature flue gas and harsh thermal conditions without shrinkage or structural deformation.

Excellent Chemical Stability

Highly resistant to acids, alkalis, solvents, and corrosive gas components—ideal for cement, metallurgy, and incineration systems.

Superior Abrasion Resistance

The inorganic glass fiber matrix delivers strong abrasion resistance, extending filter life under heavy dust loading and high-velocity gas streams.

Compatible with Advanced Surface Treatments

Can be enhanced with PTFE coating, PTFE membrane, singeing, or calendaring to improve dust release, filtration stability, and chemical protection.

Ideal for Extreme Industrial Conditions

Designed for high-temperature, corrosive, and abrasive environments such as cement kilns, metal smelting, WtE incinerators, and chemical plants.

Flexible Supply Options

Available as roll goods for further fabrication or as fully finished filter bags tailored to customer specifications.

Fiberglass Needle-Punched Felt Specifications

Technical Properties of Fiberglass Needle Felt
Fiber	Fiberglass fiber
Scrim	Fiberglass yarn
Weight (g/m²)	850
Thickness (mm)	2–4
Width (m)	≤2.2
Finish Treatment	PTFE impregnation
Air Permeability (L/m²·s @200Pa)	200–300
Tensile Strength (N/5×20cm)	Warp: 1300
Tensile Strength (N/5×20cm)	Weft: 1500
Tensile Elongation (%)	Warp: 8
Tensile Elongation (%)	Weft: 8
Temperature
Continuous Temperature (°C)	230
Instant Temperature (°C)	250
Chemical Properties
Anti-acid	Good
Anti-alkali	Good
Anti-abrasion	Good
Hydrolysis Stability	Middle

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INDUSTRIAL
APPLICATIONS

Fiberglass Needle Felt is engineered for extreme-temperature, chemically aggressive, and abrasive industrial environments. It offers outstanding dimensional stability, strong chemical resistance, low shrinkage, and long service life in challenging dust-collection systems.This makes fiberglass felt ideal for industries such as cement production, metallurgy, waste-to-energy, mining, and high-temperature combustion processes.

More Applications

Cement, Lime & Mineral Processing

Ideal for cement kilns, clinker coolers, and mineral-processing lines where extreme heat and abrasive dust are constant challenges.

Metallurgical Furnaces & Smelting Operations

Best suited for ferrous and non-ferrous metallurgy, where dust is abrasive, temperature is extreme, and chemical exposure is harsh.

Waste-to-Energy (WtE) & High-Temperature Combustion

The most reliable material for incineration and waste-to-energy systems, where acid dew point, condensate, and corrosive gases are constant threats.

Engineering Support & Customization

Pre-Project Technical Evaluation

Operating temperature window (continuous and peak, typically up to 230–250 °C)
Thermal cycling frequency and start-up / shut-down conditions
Moisture level, acid dew point, and risk of condensation
Chemical composition of the gas stream (acids, alkalis, chlorides, SOₓ, NOₓ)
Dust loading, particle size distribution, and abrasiveness
Required filtration efficiency, air-to-cloth ratio, and allowable pressure drop
Compatibility with existing bag cages, tube sheet design, and cleaning system

Custom Engineering Solutions

Selection of felt weight, thickness, fiber diameter, and permeability
Optional scrim reinforcement or multi-layer structures for higher mechanical strength
Customized surface treatments: PTFE impregnation or membrane, singed and calendared finishes for better dust release
Optimization for cement kilns, metallurgical furnaces, waste-to-energy, and high-temperature process gas
Custom bag designs: top / bottom configurations, sewing vs. welded seams, reinforcement of high-stress areas
Engineering support to integrate fiberglass felt into existing or new baghouse and gas-cleaning systems

Quality Assurance & Testing

Air permeability and pressure-drop testing at specified differential pressure
Tensile strength and elongation testing in both warp and weft directions
Heat-shrinkage and dimensional stability tests at operating temperature (up to 230–250 °C)
Chemical resistance checks in acidic and alkaline media relevant to the application
Microscopic inspection of fiber distribution, needling uniformity, and surface finish
Verification of PTFE impregnation or membrane integrity, and coating adhesion

LET’S WORK TOGETHER

Why Choose Omela Filtration?

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.

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Premium Materials & Stable Quality

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.

Advanced Production & On-Time Delivery

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.

Experienced Team with Practical Know-How

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.

Fast Service & Clear Communication

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.

Full-Cycle Technical Support

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.