Piston accumulators

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... are hydropneumatic accumulators with a floating piston to separate the compressible gas section and the fluid section.
HYDAC piston accumulators consist of a cylinder with very finely machined internal surface, with threaded end caps on the gas and fluid side, and a piston with special sealing systems. Piston accumulators can be flexibly adapted to customer requirements due to variable diameters and volumes.
Piston accumulators can be supplied with a piston position control system, or used for switching functions in hydraulic systems.

The technical specifications are:

  • Nominal volume: up to 1,200 l,
  • max. working pressure: up to 1,000 bar,
  • Piston velocity: depending on the sealing system; normally up to 3.5 m/s, but higher piston velocities are possible,
  • Accumulator shell materials: carbon steel, stainless steel, aluminium.

 

The following advantages set HYDAC piston accumulators apart:

  • minimal pressure differential between fluid side and gas side,
  • large effective volumes,
  • mounting position variable,
  • piston position indication possible by means of various control systems,
  • particularly suitable for back-up configuration,
  • very high flow rates possible,
  • no sudden gas loss in the event of seal failure.

 
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