Hydraulic accumulators – low-maintenance and system-efficient downsizing.


Your experienced supplier for hydraulic accumulators, diaphragm accumulators, bladder accumulators, piston accumulators and pulsation dampers.

Hydraulic accumulators or hydro accumulators can accumulate hydraulic fluids of a certain pressure and volume and discharge them back into the system as required. This allows valuable energy to be accumulated in the system and also provides relief for the hydraulic pump, making it smaller and less powerful.

As independent distributors of hydraulic accumulators, we offer all common pressure accumulators for mobile and industrial hydraulics – exclusively from renowned brand manufacturers. Low-maintenance and energy-efficient diaphragm accumulators, bladder accumulators, piston accumulators, metal bellows accumulators and pulsation dampers with the required high-pressure and low-pressure versions, for all common media and in accordance with the applicable pressure equipment directive

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Diaphragm accumulator

Screwed or welded diaphragm accumulators or hydro/diaphragm accumulators are predestined for a variety of mobile applications, pulsation damping, process technology and for use in compact clamping aggregates. These pressure compensators use the compressibility of a gas (e.g. nitrogen) for storing energy. It consists of a liquid part, a gas part and a diaphragm as a leak-proof separating element, the material of which must be adapted to the respective application. With the pressure increase, the diaphragm accumulator is filled and the gas is compressed. By a pressure drop, the gas volume expands and the stored pressure fluid is returned to the hydraulic circuit. Diaphragm accumulators are generally inexpensive and suitable for small installation spaces. In addition, they are lightweight and maintenance-free. In addition, they offer a high degree of flexibility, especially with regard to the installation position.

  • nominal volume: 0.075 to 4.0 l
  • Temperature ranges: from -50 °C to +120 °C
  • Maximum operating pressure P max: up to 750 bar
  • Design: screwed or welded, various accumulator materials and diaphragm materials

Bladder accumulator

Bladder accumulators are pressure accumulators that store liquids and thus energy via a flexible bladder and transfer these back to the hydraulic system when the system pressure drops. The bladder acts as a separator between the pressure fluid and the gas side. Because of the high extraction speeds and the absence of pressure differences, bladder accumulators are recommended as energy storage devices or emergency shut-offs in hydropower plants. These hydraulic accumulators also have the advantages of a simple design and the resulting serviceability, a long service life due to recurring tests and high pressure volumes of up to 450 l.  

  • Nominal volume: up to 450 l
  • Temperature ranges: from -50 °C to +120 °C
  • Maximum operating pressure P max: up to 1000 bar
  • Design: various accumulator body materials and elastomer materials

Piston accumulator

Piston accumulators isolate the gas and liquid spaces using a freely movable piston. A special sealing system, adapted to the respective application and the operating medium, is used for sealing. The primary applications for these accumulators are hydraulic applications with special media and large accumulator volumes. Because of the high-quality stainless steel housings and sealing systems used, piston accumulators are also used in seawater-resistant or seawater-protected applications. Other advantages are the flexible installation position and the wide range of possible adjustments

  • nominal volume: 0.1 to 3,300 l
  • Temperature ranges: from -60 °C to +200 °C
  • Maximum operating pressure P max: up to 1,200 bar
  • Design: screwed or welded, cylinder tubes made of high-quality pressure vessel steel, low-temperature steel or stainless steel

Pulsation damper

Pulsation dampers use the reflection principle and reduce harmful pressure peaks, pressure fluctuations or inadmissible temperature increases in positive displacement pumps. This prevents pressure pulsations and resonances from being transmitted to the entire hydraulic system. Irregularities in the volume flow are thus significantly reduced. The pulsation damper is usually mounted directly onto the pressure connection of the hydraulic pump. The pulsation dampers are also available in a robust stainless steel or polypropylene version and are suitable for corrosive operating conditions as well as low pressure systems up to 10 bar.  

  • nominal volume: 0.05 to 50 l
  • Temperature ranges: from -50 °C to +120 °C
  • Maximum operating pressure P max: up to 1000 bar
  • Design: screwed or welded, in various housing versions
Structure and function

Hydraulic energy supplied at the right time.

Hydraulic accumulators are made of a cylindrical metal body which, depending on the type, is divided by a bladder, diaphragm or piston. A special valve allows a defined pressure to be applied on the gas side. The connection on the fluid side allows the hydraulic accumulator to be integrated into the system. 

During operation, the accumulator is filled with oil and the gas is compressed in the pressure vessel. If there is a high energy demand, the gas expands and pushes the liquid to the consumer. The pressure accumulators store energy accordingly and transfer it to the hydraulic system during power peaks. For the purpose of so-called hydraulic downsizing, hydropneumatic accumulators are an energy-efficient storage device in many safety applications (maintenance of function in the event of power failure), oil leakage compensation, pulsation damping and suction flow stabilization or energy recovery (recuperation). 

Aufbau und Funktion
Auswahl Hydraulikfilter

When selecting and using your hydraulic accumulator, it is important to pay attention to the following:

Hydraulic accumulators are especially recommended for applications in which large oil quantities or volume flows are required for a short time only. Motor power and pump size can therefore be reduced accordingly, resulting in savings in valuable energy and system costs.

Make sure that the pressure vessel complies with all necessary pressure equipment guidelines, specific national regulations and transport regulations. Important decision criteria for the selection include the maximum operating pressure, preload pressure, nominal volume as well as the required medium compatibility and maintenance frequency. Servomotors with fixed displacement pumps can be a suitable alternative to hydraulic accumulators in special circumstances, because they also feed high volume flows into the system at short notice.

We are happy to advise you.


All common hydraulic accumulators and spare parts, high availability and quick delivery.

There are many reasons to order your hydraulic accumulator directly from an experienced hydraulic specialist. The first is the individual and competent support.

Comprehensive range of accumulators from original equipment manufacturers

System-compatible pressure accumulators, e.g. from Parker (Olaer), Bosch Rexroth (Eppensteiner or EPE), Roth Hydraulics or Hydac in all common designs and pressure versions.

For efficient hydraulic downsizing

Exactly the right hydraulic accumulator for all operating pressures, nominal volumes, unloading speeds and storage capacities.


Our hydraulic accumulators comply with the country-specific regulations (certificates) and the specifications of the Pressure Equipment Directive.

High availability of spare parts, quick response delivery times

If your order is received by 12 a.m., we will send your component the same day. Until 3 p.m., even as express delivery.

Professional advice by experts

As a hydraulics specialist, we provide proactive support with the collective know-how of over 40 years of hydraulics engineering expertise.