Liquids are practically incompressible. Hence they cannot be used directly for storing pressure energy. Hydraulic accumulators use the compressibility of a gas to store liquids.

Olaer piston accumulators are based on this principle. Here the gas and liquid sides are separated by a piston. The liquid chamber is connected to a hydraulic system. As the hydraulic pressure rises, the gas is compressed by the liquid flowing into the hydraulic accumulator. When the pressure drops, the gas expands and displaces the liquid from the hydraulic accumulator into the hydraulic system.

In the Olaer piston accumulator, the gas chamber is filled with nitrogen via the gas valve. In this position, the piston rests against the cover on the liquid side. If a hydraulic fluid is now pumped into the accumulator, the gas in the gas chamber is compressed. The gas volume decreases with a simultaneous increase in pressure and the hydraulic fluid accumulates in the unit.

Conversely, the accumulator will empty itself as soon as the pressure on the liquid side drops below the gas pressure.

Hydraulic accumulators are pressure vessels according to official regulations. Heat treatment, welding, soldering or mechanical processing must not be carried out on Olaer hydraulic accumulators. The operator is responsible for the operation of the pressure vessel and for strict compliance with the official operating regulations. Olaer hydraulic accumulators are equipped with an Olaer safety and shut-off block and meet the safety requirements under German legislation.

You can request our product information for:

Olaer piston accumulator EHP2 Series -type code

Olaer piston accumulator EHP Standard Series, piston diameter 100

Olaer piston accumulator EHP Standard Series, piston diameter 140

Olaer piston accumulator EHP Standard Series, piston diameter 180

Olaer piston accumulator EHP Standard Series, piston diameter 250

Olaer piston accumulator EHP Standard Series, piston diameter 360