... are hydropneumatic accumulators with a flexible bladder as a separation element between compressible gas cushion and operating fluid.
HYDAC bladder accumulators consist of a welded or forged pressure vessel, the accumulator bladder and the fittings for the gas- and medium-side connection.
In addition to the standard design, special designs for particular applications are possible, for example for very high discharge speeds and high pressures.
Essential parameters are:
  • Nominal volume: 0.5 ... 450 l,
  • Permissible operating pressure: up to 1,000 bar,
  • Materials for the elastomer: NBR, ECO, IIR, FKM (FPM),
  • Accumulator shell materials: carbon steel, stainless steel, aluminium, composite materials.

HYDAC bladder accumulators have the following advantages:
  • High discharge speeds,
  • No pressure difference between fluid side and gas side,
  • Compact, low-maintenance,
  • High charging and discharging frequencies.