Ultra Movement Flue Duct Expansion Joints
The Holz Rubber Series 952 Arch-Design Flue Duct Expansion Joint is designed for ultra-high movements in short face-to-face applications. The 952 is constructed with a large, high “V” shaped arch which allows very high axial movement while exerting very low forces on the ductwork, duct flanges, and equipment. It’s primarily used for positive pressure clean systems as it has ultra-high axial compression and extension movement.
Holz Rubber Series 952 Arch-Design Flue Duct Expansion Joint
Typical Installation Arrangement
Maximum Movement Capabilities (in inches)
Movement shown at face-to-face
Lateral Offset figures are based on the assumption that all lateral movement occurs prior to compression movements. In practice, movements may occur simultaneously thus the allowable lateral offset may increase or decrease.
Extension may be increased or decreased by pre-compression during installation. However, the amount of pre-compression will correspondingly reduce the compression ratings.
For constant vacuum, a set-back may be required to ensure the joint is not in the media stream.
Add 8 inches to the face-to-face dimension for calculating the square footage. Retaining Bars: 3/8″ X 2″, A-36 Carbon Steel.