Additional Components for Fabric Expansion Joints — The Expansion Joints Blog
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Additional Components for Fabric Expansion Joints

September 4th, 2012

In addition to the standard frame styles for our fabric expansion joints, there are additional components that are designed to augment certain styles in specific applications:

Accumulation Barrier

- Provides a flexible, low density barrier for fly ash or dust accumulation in the expansion joint cavity
- Can be provided for any design that includes a flow liner
- Typically is constructed with low density fiberglass material wrapped in aluminized fiberglass cloth and wire mesh
- In applications with large movements, the barrier can be constructed with ”ears” that are clamped under the backing bars

Insulation Pillow for High Temperature Applications

- Insulation pillow ensures that the temperature at the gas seal membrane does not exceed it’s capability
- Constructed with high density needle felted ceramic insulation wrapped with high temperature cloth and wire mesh
- Pinned snuggly to the liners or frames

Bolt-On Liner for Style 500

- The liner is attached with the fasteners of the upstream clamping bar

Bolt-On Liner for Style 700

- The liner is designed to be removed from inside the ducting to allow access to the fabric belt. The liner is attached with studs field welded inside the duct

Weld-On Liner for Style 100, 600

- The liner is field welded to the upstream inside edge of the duct


- A drain fitting machined out of PTFE material can be installed in the belt at the bottom of the expansion joint
- If conditions are wet enough to cause pooling, specify a drain

Particulate Deflector

- A particulate deflector can be specified to reduce air born particulate from falling down into the expansion joint cavity
- Most common on vertical ducting with the flow direction up and an upstream liner overlapping the downstream duct

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