Dual-Flex "DFU" Unrestrained Universal Expansion Joint System Thorburn's Dual-Flex "DFU" consists of two bellows joined by a common connector called a "pipe spool". However, unlike Thorburn's double joint Model "DFP", this connector is not anchored to the structure. This permits Thorburn's unrestrained universal expansion joint "DFU" to absorb any combination of three basic movements: Axial, Lateral and Angular. Model "DFU" is used where these combinations or single direction movements are too great to be handled by Thorburn's Single-Flex single joint. Typical installation for Thorburn's Dual-Flex "DFU" expansion joint system
Thorburn Dual-Flex "DFU" unrestrained universal expansion joint system is designed to accommodate up to 10" axial movement. |
Thorburn Dual-Flex Model "DFU" Unrestrained Universal Expansion Joint System.
When large amounts of lateral movement are required, Thorburn's untied universal expansion joint model "DFU" is used. This type of expansion joint will also result in lower forces on the anchors.
Designed to accommodate up to 10" axial movement |
Designed for greater axial movement 
between main anchors
