Bladder Accumulators

Bladder accumulators are hydro-pneumatic accumulators, which are flexible, filled with nitrogen and fitted with a steel pressure vessel. Bladder accumulators mix gas with stored hydraulic fluid to create the ideal fluid pressure.

EBV 0,5 Litres to 5 Litres

These Olaer bladder accumulators can operate at pressures between 40 bar and 80 bar and are available from Hytec Fluid Technology.

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Type HAB

This bladder accumulator from Bosch Rexroth has a nominal volume of between 1 to 50 litres and a maximum operating pressure of 350 bar.

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Back-up bottles

Hydac hydraulic accumulators available from Hytec Fluid Technology feature back-up nitrogen bottles to increase the gas volume in the accumulator.

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SBV Silicone Filled Range

Olaer bladder SBV silicone filled accumulators available from Hytec Fluid Technology feature high working temperatures of 150°C

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EHVF Flange Mounting

These Olaer bladder accumulators available from Hytec Fluid Technology can operate up to 350 bar.

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EHV Standard Range

These Olaer bladder accumulators can operate at pressures up to 350 bar are available from Hytec Fluid Technology.

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EHV DF Range

These Olaer bladder accumulators available from Hytec Fluid Technology can operate up to 330 bar.

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EBV 150 Litres to 575 Litres

These Olaer bladder accumulators can operate between pressures of 16 and 30 bar and are available from Hytec Fluid Technology.

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EBV Range 100 Litres to 200 Litres

This EBV range of Olaer bladder accumulators available from Hytec Fluid Technology can operate at pressures up to 40 bar.

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EBV Range 10 Litres to 50 Litres

These Olaer bladder accumulators can operate up to pressures of 40 bar are available from Hytec Fluid Technology.

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SB Standard Pressure Series

The SB standard pressure series from HYDAC securely stores hydraulic fluid whilst maintaining pressure.

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SB Low Pressure Series

The SB low pressure series from HYDAC securely stores hydraulic fluid whilst maintaining pressure.

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SB High Pressure Series

The SB high pressure series from HYDAC securely stores hydraulic fluid while maintaining pressure.

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EHV GD Range

Olaer bladder accumulators available from Hytec Fluid Technology can operate at pressures up to 350 bar.

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EHV 3 000 to 5 000 PSI

These Olaer bladder accumulators available from Hytec Fluid Technology can operate in temperatures ranging from -15°C to 80°C.

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EHV 690 Bar

These Olaer bladder accumulators can operate at pressures up to 690 bar are available from Hytec Fluid Technology.

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Bladder Accumulators

  • Olaer bladder accumulators have a wide pressure range, adapt to different fluids and have elastomers with a very high grade of impermeability. They can be adapted to suit low and high temperatures, can be installed horizontally or vertically, and cannot be disassembled while under pressure. The range includes standard bladder accumulators as well as those designed for oil & gas, ASME and high pressure.
  • HYDAC bladder accumulators consist of either welded or forged pressure vessels, the accumulator bladder itself and the fittings for the gas-side and medium-side connection. They come in a standard design but special designs for particular applications, such as for very high discharge speeds and high pressure, are possible.
  • Bladder type accumulators from Bosch Rexroth are mounted with clamping collars and consoles, have maximum flow rates from 240 to 900 litres a minute and maximum operating pressure of 330 bar. Hydraulic fluid used is hydraulic oil according to DIN 51524, but other fluids are provided on request.

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Bladder accumulator applications

  • Energy storage in order to save pump drive power in intermittent operation systems
  • Energy reserve for emergencies, e.g. upon failure of hydraulic pump
  • Compensation of leakage losses
  • Impact and vibration absorption in case of periodic vibrations
  • Volume compensation in case of pressure and temperature changes

The benefits of using bladder accumulators:

  • High discharge speeds
  • No pressure differential between fluid-side and gas-side
  • Compact, low-maintenance
  • High charging and discharge frequencies

Inspecting and testing your accumulators

Accumulators should be subjected to internal and external inspections and hydrostatic pressure tests.  Hytec Fluid Technology (HFT) has an accumulator Certification Centre incorporating an accumulator test bench to help clients comply with regulations governing accumulator usage. HFT is authorised to provide certification of manufacture and the verification signature of an Approved Inspection Authority.

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