Athermalization (atherm) bellows assemblies are filled and sealed flexible bellows assemblies that translate changes in temperature into precise linear mechanical motion.
Atherm bellows assemblies take advantage of the flexible, expandable nature of precision electroformed metal bellows, and the steady volumetric expansion of incompressible fluids with changes in temperature. These bellows assemblies have known temperature-dependent rates of length change depending upon the fluid used in the assembly.
Each end of the bellows connects to system components using stock fittings or custom fittings designed to meet customer requirements. These fittings allow the dimensional change of the bellows to translate into mechanical axial motion that affects the desired change in the system.