Diaphragm accumulators are hydraulic devices that store energy through pressurized fluid.

They consist of a cylindrical or spherical shell with a flexible rubber membrane, i.e. a diaphragm, inside that separates two chambers: one filled with gas (usually nitrogen) and the other with a liquid (such as hydraulic oil).

Used in hydraulic systems, they absorb pressure peaks, stabilize flow, and reduce vibrations.

They are particularly suitable for systems with limited volume variations.