Universal expansion joints

Universal expansion joints consist of two metal bellows connected together by a central tube. The movement absorption of universal expansion joints is not limited by tie rods or joint tensions so universal expansion joints can absorb both axial and lateral expansions.

HKS DN 1000 universal expansion joint, with rotatable flared flanges at both ends and transport struts
HKS universal expansion joint with transport bars

In universal expansion joints higher acid stability and greater lateral expansion absorption is achieved by the central tube in comparison to an axial expansion joint with only one bellows.

Universal expansion joints can usually be used up to a pressure level of 6 bars. A prerequisite for choosing universal expansion joints is the possibility of placing the required fixed points and guides.