Thorburn's Dual-Flex model DFT expansion joint is made up from two single expansion joints connected by a piece of pipe called the center spool. Tie rods are then attached on the outer ends to span both the bellows and the center spool. This type of construction allows the bellows to absorb the thermal growth of the piping between the tie rod attachments and still eliminates the pressure thrust on the system.

The most common application for Dual-Flex Model DFT tied universal expansion joint system is the "Z" shape piping system. In this case, the expansion joint absorbs the thermal growth of the horizontal piping as lateral deflection.

• Absorbs large amounts of lateral movement in any direction

• Eliminates pressure thrust loads

• Absorbs thermal growth of piping between the tie rods

• Eliminates main anchors

• Can support deadweight of the center spool

• Sizes up to 6m (240")