Fabric Expansion Joints

When air and hot gas duct systems require superior flexibility and high-temperature resistance, Enerkeit fabric expansion joints are the engineering solution by design. We specialize in the custom manufacturing of non-metallic joints, designed to absorb large movements in complex geometries where metal or rubber joints are not viable.

Our solutions are the standard in low-pressure systems for handling combustion gases, hot air, and other gaseous media in the most demanding industries.

Unique Advantages of Fabric Joints

Fabric expansion joints offer unmatched versatility, being the ideal technical solution for a variety of operational challenges.

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Adaptability to Complex Geometries: Custom-manufactured for square, rectangular, circular, or oval ducts, ensuring a perfect fit.
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High Temperature Resistance: Thanks to their multilayer construction with insulating materials, they can operate in systems with gases up to 1000°C (1832°F).
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Lightweight and Low Load: Their fabric construction does not add structural stress to ducts and supports, unlike heavy metal joints.
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Chemical Resistance: We select barrier materials, such as PTFE, to ensure compatibility with corrosive gases and acid condensates.
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Excellent Acoustic and Thermal Insulation: In addition to absorbing movement, they reduce noise transmission and heat loss in the system.

Multilayer Construction: Engineering for Every Condition

The secret to the performance of a fabric joint lies in its multilayer design, where each material fulfills a critical function.

• External Layer: The first barrier against the environment. Generally made of silicone-coated fiberglass fabric, it protects against weathering, moisture, and mechanical damage.

• Insulation Layer: Composed of materials such as ceramic fiber or fiberglass, this layer is the thermal shield that protects the inner layers from the high gas temperatures.

• Chemical and Gas Barrier (Seal Layer): The most important component. A PTFE (Teflon®) membrane or a similar compound guarantees total gas impermeability and resists chemical attack from the fluids.

• Internal Layer: A metal mesh or fiberglass reinforcement that protects the chemical barrier from direct contact with abrasive particles in the gas flow.

Industries and Main Applications

Our fabric expansion joints are crucial components in a wide variety of industries:

• Cement Plants (Kilns, coolers, mills)

• Power Generation (Combustion gas ducts, DeNOx and DeSOx systems)

• Steel and Foundries

• Pulp and Paper Plants

• Chemical Industry

• Pollution Control Systems (Scrubbers, precipitators, baghouse filters)

• Mining

Enerkeit: Your Partner in Custom Flexible Solutions

Every fabric expansion joint is an engineering project. At Enerkeit, we work directly with you to understand your operating conditions: temperature, pressure, gas composition, and movement profile.

With this information, our team designs and manufactures a "custom-tailored" joint, selecting the combination of materials and structural design that will ensure safe, reliable, and long-lasting operation.

Do you need a joint for a large-diameter duct or a connection with excessive movement? Does your system handle high-temperature gases with abrasive particles?

Let our specialists provide you with the most effective engineering solution.

Request a Custom Design Now.

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