Fabric Expansion Joint
Layered PTFE, glass, silicone and ceramic textiles that absorb axial, lateral and angular duct movement at once — with almost no reaction force, at temperatures beyond 1000 °C.
Technical Data
| Duct geometry | Round, square or rectangular — any custom opening |
|---|---|
| Gas seal layer | PTFE, FKM, EPDM or fluoroelastomer — gas-tight, chemical resistant |
| Insulation layer | Glass fibre, mineral wool or ceramic blanket — thermal barrier |
| Reinforcement | Stainless-steel mesh, aramid or glass fibre |
| Outer cover | PTFE or silicone-coated glass fabric — weather, UV and abrasion protection |
| Steelwork | Frames, backing bars and liners in carbon or stainless steel |
| Design temperature | Ambient to 1000 °C+ at the hot face |
| Design pressure | Low-pressure / draft duct service (mbar range) |
| Movement | Axial, lateral, radial and angular — torsional on request |
| Reaction force | Near zero |
Selection Guide
PTFE film and coated-glass layers for chemical flue gas to ~260 °C.
Best forFGD · chemical exhaustGlass / aramid structure with ceramic-fibre hot-face bolster past 1000 °C.
Best forGas turbines · furnacesFrames, backing bars and liners in carbon or stainless steel, ready to bolt.
Best forComplete supplyDatasheet & Drawings
The full specification on one page, plus the technical drawing. A certified approval drawing for your exact configuration follows with the quotation.
EN 10204 3.1 material certificates are supplied with your shipment.
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Frequently Asked Questions
What is a fabric expansion joint?
A flexible, layered textile connector that seals a duct while absorbing large multi-directional movement at almost no reaction force — used on low-pressure gas and air ducts such as flue-gas and turbine-exhaust systems.
How hot can it operate?
Depending on the layer build-up, the hot face handles anything from warm ventilation air to gas streams beyond 1000 °C, using PTFE, glass, silicone, aramid and ceramic layers over an insulation bolster.
Fabric or metal expansion joint — which do I need?
Fabric joints excel on low-pressure ducts that need very large movement with negligible load on fans and casings; metal joints suit higher pressures and more erosive duty. TOTFLEX supplies both.
What movements does it absorb?
Axial, lateral and angular movement simultaneously — and it forgives the misalignment common on large site-erected ductwork, all with near-zero spring force.
Can it be replaced during an outage?
Yes. Belt-type elements are designed to be changed in situ during a normal outage, often without cutting steel.
Is documentation provided?
Each joint is supplied with an approval drawing, layer specification, corner and site-splice details, and material data sheets on request.
Engineered to order. Delivered worldwide.
Send your duty conditions — size, pressure, temperature, medium and connections — and our engineers return a drawing, material selection and lead time.
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