Fabric Expansion Bellows are flexible, high-performance components used to absorb thermal expansion, vibration, and misalignment in piping and duct systems. These bellows are specifically designed for applications where metal expansion joints may not be suitable due to movement requirements, low weight, or complex system configurations. Fabric expansion bellows provide an efficient and cost-effective solution for industries requiring flexibility, durability, and high-temperature resistance.

Size Range: 500nb to 4000nb in circular, 7 meter x  20 meter long in Rectangular
Our fabric expansion bellows are available in a broad size range, from 500nb to 4000nb in circular and upto 20 meter in Rectangular, accommodating a wide variety of ductwork and piping systems. This flexibility in sizing ensures that the bellows can be seamlessly integrated into any industrial or commercial setup, regardless of its size or complexity.

Temperature Range: Up to 2000°C
Fabric expansion bellows are engineered to withstand extreme temperatures, with a capability of handling temperatures up to 2000°C. This makes them ideal for high-temperature applications such as exhaust systems, power generation, and industrial furnaces. The specialized fabrics used in their construction ensure that the bellows perform reliably, even in the harshest thermal environments.

Pressure Range:
In addition to temperature resistance, our fabric expansion bellows can handle pressures up to 3 bar. They are designed to perform under both high-pressure and low-pressure environments, making them versatile for various industrial applications, including HVAC systems, power plants, and petrochemical industries.

Types of Fabric Expansion Bellows

Fabric expansion bellows are available in different designs to suit specific industrial needs. The flexibility in material and design allows for various movements and environmental conditions to be accommodated.

1. Single Layer Fabric Bellows
   These bellows consist of a single layer of fabric and are used in systems with moderate temperature and pressure requirements. They provide excellent flexibility and are typically used in applications with lower thermal demands.

2. Multi-Layer Fabric Bellows
   Multi-layer fabric bellows are designed for higher temperature and pressure applications. These bellows are made up of several layers of fabric materials, each providing a unique protective function. The outer layers protect against abrasion and mechanical damage, while the inner layers provide insulation and temperature resistance.

3. Insulated Fabric Bellows
   For applications where extreme heat is a concern, insulated fabric bellows are ideal. They include an additional layer of insulation to enhance thermal performance and protect sensitive system components from excessive heat.

Fabric Materials Used

Our fabric expansion bellows are constructed using a variety of high-performance materials, each chosen for its specific properties and ability to withstand harsh conditions:

1. Fiberglass
   Fiberglass fabric is commonly used in fabric expansion bellows for its excellent heat resistance and mechanical strength. It can handle high temperatures while maintaining flexibility, making it ideal for use in exhaust systems, gas turbines, and ducting applications.

2. Silicone-Coated Fiberglass
   For applications requiring additional weather and chemical resistance, silicone-coated fiberglass is an ideal option. This material combines the heat resistance of fiberglass with the durability and water resistance of silicone, making it perfect for outdoor and corrosive environments.

3. PTFE (Teflon) Coated Fabrics
   PTFE-coated fabrics offer exceptional resistance to chemicals and extreme temperatures. They are ideal for use in highly corrosive environments and applications where non-stick properties are required. PTFE-coated bellows are commonly used in chemical processing plants and food industries.

4. Kevlar®
   Kevlar fabric is known for its high tensile strength and ability to withstand both extreme heat and mechanical stress. It is commonly used in heavy-duty applications such as power plants and furnace systems, where both high temperature and durability are essential.

5. Vermiculite-Coated Fiberglass
   This fabric is designed for ultra-high-temperature applications. Vermiculite-coated fiberglass enhances the thermal insulation properties of the bellows, allowing them to handle temperatures near 2000°C. It is particularly useful in furnaces, incinerators, and other high-heat applications.

Key Benefits of Fabric Expansion Bellows

• Extreme Temperature and Pressure Resistance: Capable of withstanding temperatures up to 2000°C and pressures up to 3 bar, these bellows are ideal for high-demand applications.

• Flexibility and Customization: Fabric bellows can be customized to fit unique industrial systems, offering flexibility in design and installation.

• Corrosion Resistance: The use of PTFE and silicone-coated fabrics ensures that the bellows can handle corrosive environments without degradation.

• Lightweight Design: Fabric expansion bellows are lightweight compared to metal bellows, making them easier to install and suitable for large-scale ductwork.

• Cost-Effective: Due to their material flexibility and ease of installation, fabric bellows offer a cost-effective solution for handling expansion, contraction, and vibration in complex piping systems.

Applications

Fabric expansion bellows are used across various industries, including:

• Power Generation (boilers, turbines, exhaust systems)

• Chemical and Petrochemical Plants

• HVAC Systems (ducting, ventilation)

• Metal and Glass Industries (furnaces, kilns)

• Marine and Offshore Applications

Conclusion

Fabric expansion bellows provide a flexible, durable, and cost-effective solution for managing thermal expansion, vibration, and misalignment in industrial systems. With a wide size range (500nb to 4000nb in circular nad upto 20 meter in rectangular), high-temperature capability (up to 2000°C), and pressure tolerance (up to 3 bar), these bellows are designed for demanding applications across multiple industries. By utilizing high-performance materials like fiberglass, Kevlar®, PTFE, and silicone-coated fabrics, our fabric expansion bellows ensure long-lasting performance and reliable operation in the most challenging environments.