Industrial Rectangular Fabric Expansion Joint (Non-Metallic)

Advanced Multi-Layer Flexible Solutions for High-Temperature Industrial Ducting

1. Product Overview

The Devel® Rectangular Fabric Expansion Joint is a state-of-the-art flexible connector engineered specifically for high-temperature flue gas and industrial air ducting systems. Unlike metallic bellows, our fabric joints utilize a multi-layer composite architecture to provide virtually unlimited flexibility. They are the ultimate solution for power plants, steel mills, and cement facilities requiring superior compensation for thermal expansion, vibration, and significant structural misalignment.

2. Advanced Multi-Layer Construction

• Outer Protective Layer: Heavy-duty Silicone or Fluorine coated fiberglass cloth for weatherproofing and UV protection.
• Structural Support Ply: High-tensile technical fabrics that maintain the joint’s shape under positive or negative pressure.
• Chemical Barrier (Critical): A specialized PTFE (Teflon) membrane ensuring zero gas permeability and total resistance to acidic condensation (FGD/SCR compliant).
• Thermal Insulation Layer: Multi-layer ceramic fiber or needle-felt blankets, allowing the joint to withstand continuous temperatures up to 1000°C (1832°F) while keeping the outer skin safe.

3. Design Advantages & System Benefits

• Integrated Multi-Plane Compensation: Engineered with a high-flexibility composite structure, these joints simultaneously accommodate large axial, lateral, and angular thermal movements. This allows for superior performance in complex ducting layouts where installation space is limited.
• Minimal Reaction Forces: The low spring rate of our technical fabrics ensures that negligible stress is transferred to the connected ductwork, fans, or turbine flanges. This inherent flexibility helps prevent structural fatigue and extends the overall service life of the system.
• Advanced Chemical & Thermal Barrier: By utilizing premium PTFE membranes and high-density insulation layers, our joints remain gas-tight and resistant to acid dew point corrosion, even under continuous high-temperature flue gas conditions up to 1000°C.
• Effective Vibration & Acoustic Damping: The non-metallic elastomer and fabric layers act as a natural damping interface, significantly reducing the transmission of mechanical shock and high-frequency noise from heavy-duty industrial blowers.
• Engineered for Simplified Maintenance: The lightweight, non-corrosive nature of fabric joints eliminates the rust issues common with steel bellows. Additionally, for ultra-large ducts, we provide belt-type segments that allow for efficient on-site splicing without the need for heavy lifting equipment.

4. Typical Application Scenarios

• Power Sector: Gas turbine exhaust, boiler flue gas, FGD/SCR systems.
• Heavy Industry: Cement kiln inlets, metallurgy dust extraction, and smelting furnaces.
• Waste Management: Incineration plants and chemical scrubbers.

5. Product Parameter Table

Note: Above information based on the Devel factory standard. Other technical requirements can be reached according to your requirement.