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hydraproducts Mini Pack

Bladder Accumulator

Maximum working pressure 470bar, Volumes up to 500L, Elastomer compatible

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hydraproducts Mini Pack

Diaphragm Accumulator

Pressure range up to 350bar, Volumes up to 3.5L, Low maintenance design

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The accumulators role in a hydraulic system is to allow fluid accumulation under pressure and it holds and stores then returns the fluid based on the variance in compression that is created between liquid and gas.

Accumulators benefit the operation of a hydraulic system and help to improve the following areas:

  • Lengthening the operational life of a system
  • Improving the all-round functioning of a system
  • Helping to cut down the costs of maintenance and large repair bills
  • Aiding in system noise reduction

Accumulators typically come in two main types - Bladder and Diaphragm which each work in varying ways to achieve the same goal - to store and discharge energy in the form of pressurised fluids.

With Bladder accumulators, the hydraulic pump brings up the system pressure and pushes fluid into the accumulator. The bladder then moves to compress the gas volume because the fluid pressure will always exceed the pre-charge pressure. This is the source of the stored energy. The movement then stops when there is a balance of system and gas pressure.

Diaphragm accumulators work in a similar way to bladder accumulators with the main difference being that an elastic diaphragm is used to separate the volumes of gas and oil.

They typically offer flow and volume to around one gallon and are popular due to their light weight and good economy. They can handle high compression ratios of up to around 10:1 as the surrounding rubber barrier does not suffer as much from distortion as a bladder accumulator. They can accommodate a wide range of mounting flexibility and can deal with contamination better than alternatives. Diaphragm accumulators are also suitable for shock applications as they can respond very quickly to changes in pressure.

The accumulators we stock comply with 97/23/EC design standards as well as both ASME and RINA. 

  • Why choose Hydraproducts as your component supplier?
  • Manufacturers

Hydraproducts has a large stock holding of components we are able to support irregular customer requirements. If you have regular needs then we are happy to hold bonded stock to smooth out production/supply fluctuations.

Supporting our customers with the comfort that our engineers have been using these components to build hydraulic systems in our own workshops for over 15 years. Our Technical Sales engineers can help and advise on product choice as well as identifiy and cross reference a wide variety of other hydraulic equipment manufacturers.

Key manufacturers 

OMT - Based in Italy, OMT has become a world recognized manufacturer of Hydraulic components. A recent acquisition of Luen, Hydraulic cartridge Valve manufacturer, has strengthened the group within mobile and industrial markets. 

OT - With a engineering pedigree in Italian gear pump manufacturing, this company produces some the of the finest Aluminium hydraulic Gear pumps available today. They are customer focused with a very reactive production philosophy.

TEC - Tec motors have become the largest reseller of AC induction motors in the  UK. Hydraproducts has fitted the TEC (TECHTOP) motors to our power packs and power units for over 15 years, so we know the quality is well suited to this market palce.

  • More about Micro Power Packs
  • Typical Applications

The HPU micro power pack has a single acting hydraulic circuit, the check valve and solenoid valve hold the cylinder load up. A high quality hardened steel check valve insert ensures low leakage and excellent load holding. Versions with Normally open/closed solenoid check valves and low noise check valves are available.

All of these micro hydraulic power packs have a precision engineered aluminium manifold that houses the hardened steel valves. A carefully developed micro hydraulic pump gives pressures up to 200bar. Each manifold has an integrated 90 micron filter element, ensuring all micro hydraulic systems are protected and give a long service life.

To drive the hydraulic pumps we offer DC motors from 150 to 800Watt, in 12V and 24VDC. 150 and 250Watt Fractional Horsepower AC motors as well as standard IEC frame AC motors from 0.18kW to 0.37kW.

Pump sizes range from 0.17cc to 1.48cc/rev.

Tanks from 0.1 to 1 Litre, all of which can be in vertical (tank uppermost) or horizontal orientation.

Typical applications include :- 

    Mobility lifts where Wheelchairs are lifted from vehicles
    Micro power packs for through floor lifts.
    Door and gate opening actuators

Hydraproducts offers its worldwide OEMs and distributors reliable products through design and manufacturing expertise. The quality of in-house design, manufacturing and experience in micro hydraulic power units ensures a match to your requirements.