Bosch Rexroth Diaphragm-Type Accumulators (HAD)

Diaphragm type accumulators are used for energy storage, shock and vibration absorption, and leakage oil compensation or volume compensation in hydraulic systems. They consist of a pressure-resistant vessel (high-tensile steel) whose interior is split into a gas and fluid side by an elastic diaphragm.

When the operating pressure is increased, hydraulic fluid flows into the accumulator and compresses the gas until the gas pressure is identical to the fluid pressure. When the operating pressure is reduced, the gas expands again and feeds the hydraulic system with hydraulic fluid.

Bosch Rexroth HAD Accumulator 1xBosch Rexroth’s range of Diaphragm type Accumulators HAD are available in the following:

  • Nominal volume 0.075… 3.5 litres
  • Component series 1X, 2X


Key features include:

  • Hydraulic accumulator as per Pressure Equipment Directive 97/23/EC
  • Diaphragm material for different applications
  • Use e.g. as energy storage in intermittent operation systems, energy reserve for emergencies, compensation of leakage losses, shock and vibration absorption.



Neilson Hydraulics supplies Bosch Rexroth’s Diaphragm type Accumulators HAD – to view the full range visit: or call the team on 01709 821 002.

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