Precision Woven High-Temperature Filter Bags for 260°C Continuous Service

Skytech Ultrafab Woven Fibre Glass Filter Bags are manufactured from silica-based E-glass yarns in tight weave constructions for dust collection in high-temperature applications such as coal-fired boilers, cement rotary kilns, and glass furnaces operating at up to 260°C continuous. The smooth woven surface provides excellent cake release and dimensional stability under thermal cycling. Standard PTFE treatment and ePTFE membrane lamination options enhance chemical resistance and particle capture efficiency.

What Are Woven Fibre Glass Filter Bags?

Woven fibre glass bags are produced by weaving E-glass (electrical grade silica glass) yarns in plain or satin patterns to form a smooth, tightly woven filtration fabric. Unlike needle-felt, the woven structure provides surface filtration — particles are captured on the smooth bag exterior rather than penetrating into the fabric depth. This allows effective cake release during reverse-air cleaning without media blinding, making woven glass the preferred media for large reverse-air baghouses in power generation and cement applications.

Features and Benefits

• 260°C Continuous Temperature Rating: E-glass fibre retains full tensile strength and dimensional stability at 260°C continuous — the highest temperature rating among woven bag materials at reasonable cost
• Smooth Surface for Cake Release: Plain or satin woven surface enables clean, complete dust cake release during reverse-air cleaning — preventing cake blinding that shortens bag life
• PTFE Treatment Standard: Standard PTFE finish reduces surface energy — preventing fine dust adhesion and minimising filter cake remnants after cleaning pulses
• Excellent Dimensional Stability: Woven construction resists thermal shrinkage across wide temperature ranges — maintaining precise bag diameter and length through thousands of thermal cycles
• ePTFE Membrane Option: ePTFE surface membrane lamination for sub-micron emission compliance while retaining the high-temperature capability of the fibreglass base
• Chemical Resistance: E-glass with PTFE treatment provides good resistance to most acidic and alkaline flue gas components encountered in power and cement applications

Technical Specifications

Applications

• Coal-Fired Power Plants: Large reverse-air baghouses on boiler ESP bypass and as primary filters — woven glass handles the combined fly ash abrasion and high temperature of coal combustion flue gas
• Cement Rotary Kilns: Kiln inlet, kiln outlet, and bypass baghouses where continuous operating temperatures exceed the limits of all polymeric filter bag materials
• Glass Manufacturing: Glass furnace exhaust filtration where process gas temperatures are high and contain fluoride and alkali compounds that attack standard polymer fibres
• Secondary Metal Smelting: High-temperature aluminium, copper, and secondary metal smelting furnace fume filtration where woven glass provides the required thermal performance
• Hazardous Waste Incineration: Very high temperature incinerator flue gas filtration where woven glass with ePTFE membrane provides thermal and chemical performance in one element

Why Choose Skytech Ultrafab for Woven Fiber Glass Filter Bags?

• Long Bag Manufacturing Capability: Woven glass bags manufactured up to 12 m length for large power plant reverse-air compartments — seamless where possible to minimise bypass risk
• PTFE Treatment In-House: PTFE finishing of woven glass fabric performed in-house — controlling PTFE loading and uniformity for consistent performance across every bag produced
• Dimensional Precision: Woven glass bags produced to ±1 mm diameter and ±5 mm length tolerances — critical for consistent snap-ring seating in reverse-air tube-sheet holes
• Thermal Performance Testing: Bags tested for dimensional stability after simulated thermal cycling before despatch — guaranteeing in-service performance meets design specification
• OEM Cross-Reference: Bags produced to match existing woven glass bag specifications from Ryton, Fibrotex, Gore, and other major woven glass bag manufacturers for direct replacement