The oleo-pneumatic accumulators have many generic applications: Energy storage, impact absorption, dampening of water hammer effect, transference of pressure between two different fluids, keeping the pressure in leaking circuits, to compensate the variations in the volume of a liquid due to its thermal dilatation, machine tools, etc…
Oleo-pneumatic accumulators are used in hydraulic applications of all kind of sectors: Agricultural, chemical, transport, power generation, etc…
Though, strictly speaking, oleo-pneumatic accumulators are used in oleo-hydraulic circuits (hence the “oleo” part of the name), there are certain applications where, nevertheless, water is used instead of oil.
There are two kinds of oleo-pneumatic accumulators: Piston type and bladder type.
SOME TECHNICAL INFORMATION OF INTEREST REGARDING OLEO-PNEUMATIC ACCUMULATORS:
Transformation of a double effect cylinder into a single effect one in order to make it work either as a lifting cylinder or as a shock absorber, with an oleo-pneumatic accumulator attached (pdf file).