Hydraulic accumulators

Hydraulic accumulators from HYDAC are essential components for optimising hydraulic systems by storing hydraulic energy and compensating for volume flows. They are based on the principle of nitrogen compressibility to absorb incompressible hydraulic fluids under pressure. Our accumulator solutions reduce the installed drive power, dampen pressure surges and protect critical functions in the event of pump failures. Through the precise coordination of the gas and liquid sides, they ensure consistent system performance and increase the service life of the entire hydraulic system.

Accumulator types in comparison

Accumulator types	Key benefits	Examples of application areas
Bladder accumulator	Rapid reaction, high gas-fluid separation	Machine tools, energy storage
Piston accumulator	Large volumes, high pressure ratios	Press construction, heavy industry, offshore
Diaphragm accumulator	Compact design, low weight, cost-efficient	Mobile hydraulics, suspension
Metal bellows accumulator	Maintenance-free, permeation-free, for extreme temperatures	Aerospace, medical technology

Integration & system benefits

The integration of a HYDAC hydraulic accumulator enables significant efficiency gains in industrial processes. In addition to the classic emergency function in the event of power failure, they are primarily used for leakage compensation and thermal volume expansion. For engineers, the reduction of vibrations and noise emissions through effective pulse damping is particularly relevant. Our accumulators comply with international pressure vessel guidelines (such as PED, ASME, CRN) and can also be integrated modularly into existing systems thanks to an extensive range of accessories, such as safety and shut-off blocks and fastening elements.

Selection criteria & tool support (online tools)

The correct configuration is crucial for the operational safety. Factors such as the maximum operating pressure, the required draw-off volume and the gas pre-tension (p₀) define the accumulator type and also the accumulator model. Use our digital engineering tools such as ASP light or the p₀ calculatorto accurately simulate the thermodynamic state changes. This ensures that the accumulator is neither over-sized nor at the performance limit, which sustainably optimises the total cost of ownership (TCO).