DF-01/DB-04 (Flat) Expansion Joints are designed for applications requiring standard movement, maximum noise, vibration and sound absorption.

DF-02/DB-05 (Radius) Expansion Joints offer superior axial and lateral movement capabilities without pre-compression or pre-extension.

DF-03/DB-06 (Arch) Expansion Joints are designed for high movement in short face-to-face applications. Primarily used in positive pressure systems having high axial compression and extension movements.

Baffles or flow liners are used when the gas stream contains particulates which may impinge upon or abrade the inner surface of the duct connector. Baffles can be constructed as a one-piece or two-piece element, depending on movement requirements and service conditions.

Elastomeric Type - This type of expansion joint is constructed of elastomers and reinforced with high strength fabric. Choice of elastomer and fabric, depends on applications conditions. Maximum temperature for elastomeric expansion joints is 400° F.

Composite Type - Suitable for temperatures from 400°F to 2500°F, composite type expansion joints consist of various plies of materials laid one over the other and vulcanised, bonded, sewn or mechanically fastened together in the clamp area. This allows each layer of material to function independently of the others.

High Temperature and Buildup Solutions - Fly ash or other solid particulates can accumulate between the expansion joint and flow liner in such quantities that damage to the expansion joint may occur. A mesh or cloth seal between the liner and ducting can help prevent this problem. Another method of eliminating this buildup is the use of an insulation pillow to fill the cavity. Insulation pillows can also be used to increase the upper temperature limits of the expansion joint. Care must be taken when using an insulation pillow, so that corrosive chemicals do not condense in the cooler region adjacent to the expansion joint and duct work.