Piston Accumulators

Type SK High Pressure

These HYDAC piston accumulators use nitrogen as the compressible medium with the piston acting as the gas proof screen.

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SK 280

These HYDAC piston accumulators have working pressures up to 280 bar and are very light and versatile.

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100 mm & 250 Bar

This piston accumulator from Olaer has a diameter of 100 mm and operates at pressures up to 250 bar.

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180 mm & 280 to 375 Bar

This piston accumulator from Olaer has a diameter of 180 mm and operates at pressures up to 375 bar.

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250 mm & 220 to 350 Bar

This piston accumulator from Olaer has a diameter of 250 mm and operates at pressures up to 350 bar.

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360 mm & 220 to 350 Bar

This piston accumulator from Olaer has a diameter of 360 mm and operates at pressures up to 350 bar.

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140 mm & 250 Bar

This piston accumulator from Olaer has a diameter of 140 mm and operates at pressures up to 250 bar.

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Bosch Rexroth Africa brings the world’s leading hydraulics, pneumatics and automation brands to Africa!

Piston accumulators from Hydac have a finely processed interior with a screw-in cover on the gas and fluid sides. They are easily adjusted for flexibility to customer-specific requirements and the piston position can be made visible and be used for switching functions in the hydraulic system. The selection of the volume is stepless.
Bosch Rexroth piston accumulators are always engineered to order, and are customer-specific. Standard diameters are 360 and 500 mm and are variable in length up to 5 500 mm. They operate in temperatures from -20° c to 60° C, have a maximum piston speed of 3 500 mm/sec and maximum pressure of 220 bar.
Olaer piston accumulators are designed to operate at extreme temperatures and any pressure ratio. With 5 to 200 bar pressure options in the range, they are available in carbon steel, stainless steel, duplex or super duplex steels and aluminium materials

Bosch Rexroth Africa brings the world’s leading hydraulics, pneumatics and automation brands to Africa!

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Piston accumulator applications:

Energy storage
Emergency and safety functions
Damping of vibrations, pulsations and shocks and noise
Suction flow stabiliser
Chassis suspension

Volume and leakage adjustment
Weight equalisation
Energy recovery, recuperation
Media separation

Advantages and benefits of piston accumulators:

Adaptation to high temperature
Adaptable in transfer systems
Piston position indicator

Very high compression ratio
Customised capacity
Prevents disassembly while under pressure

Inspecting and testing your accumulators

HFT, a Bosch Rexroth Africa company, is authorised to provide certification of manufacture and the verification signature of an Approved Inspection Authority for accumulators. To facilitate this, HFT has an accumulator certification centre incorporating an accumulator test bench to help clients comply with regulations governing accumulator usage. Accumulators should be subjected to internal and external inspections and hydrostatic pressure tests.

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Piston Accumulators

Type SK High Pressure

SK 280

100 mm & 250 Bar

180 mm & 280 to 375 Bar

250 mm & 220 to 350 Bar

360 mm & 220 to 350 Bar

140 mm & 250 Bar