The DFI-7000 Series expansion joint is normally supplied as a factory assembled unit, ready for installation. Our scope of supply would consist of the angle iron framework, flat bar retainers with fasteners and the flexible element.

This configuration lends itself primarily to atmospheres not exceeding 600 degree F temperature. In specific circumstances it can, however, be manufactured utilizing a flow liner which would permit the use of a composite or high temperature flexible element.

The hex nuts retaining the belt can be tack welded to the flow side of the framework, if a customer prefers. This allows for removal of the belt from outside of the duct.

A major convenience that is provided with this DFI-7000 series is most apparent at installation time.

Like our 2000 and 6000 series joints, the DFI-7000 series can be slid in between existing companion flanges and bolted up. Both the bolt head and nut of the mounting fasteners is extremely accessible.

Experienced field personnel will always confirm the many costly hours that are usually, unnecessary, if more consideration was given to potential installation problems.

The DFI-7000 series expansion joint is manufactured in both round and rectangular configurations. As on all DESIGN FAB rectangular joints, we suggest the use of radiused corner sections to wrap the flexible element around. This extends the service life of the element and provides a much tighter seal between the element, retainer and framework.