Bladder accumulators

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... are hydropneumatic accumulators with a flexible bladder. The gas and oil side are separated by this bladder.
HYDAC bladder accumulators consist of a welded or forged pressure vessel, an accumulator bladder and valves at the gas and the fluid connection.
In addition to the standard construction, special constructions are possible, especially for applications for very high flow rates (e.g. up to 100 l/s) or pressures (e.g. up to 1,000 bar).

The technical specifications are:

  • Nominal volume: 0.5 ... 450 l,
  • Max. working pressure: up to 1,000 bar,
  • Available elastomers as standard: NBR, ECO, IIR, FKM (FPM),
  • Accumulator shell materials: carbon steel, stainless steel, aluminium.

The following advantages set HYDAC bladder accumulators apart:

  • high flow rates possible,
  • no pressure differential between fluid side and gas side,
  • compact, low maintenance,
  • high cyclic frequencies.
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