Hydraulic accumulatorthat uses a gas as the medium for applying a load to the hydraulic fluid (air foraccumulators for water hydraulics, nitrogen for oil accumulators).
As a consequence of the gas cushion the accumulator pressure drops with increasing withdrawal of the usable volume in accordance with the ratio of gas capacity to oil volume (Figure G 1).
Alternative: spring accumulator, weight accumulator.
![c5707d1da39903ac1e7e45c4872504cb195b2fdf 0001_gasdruckspeicher.gif](/fileadmin/smc/files/c5707d1da39903ac1e7e45c4872504cb195b2fdf.gif)
Figure G 1: p/V diagram of a hydraulic accumulator