Fluids are practically incompressible and can therefore not be directly used for energy storage. Hydraulic accumulators make storing fluids under pressure possible. Their operating principle is based on the Boyle-Mariotte’s law (P x V = constant) and the compressibility difference between fluids and gases.

OLAER bladder accumulators series high-pressure EHV are ideal for any application.
Their use is recommended everywhere where accumulators are used as energy reserves, such as in hydrostatic bearings, lubricating oil supplies, chucking systems on machine tools, safety and emergency braking systems.

OLAER bladder accumulators series low-pressure EBV are ideal for any application.
Their use is recommended everywhere where accumulators are used as energy reserves, such as in hydrostatic bearings, lubricating oil supplies, chucking systems on machine tools, safety and emergency braking systems.

Because of their simple design, membrane accumulators OL – ELM are particularly suitable for secondary applications. They are available in different versions. The different types of design give flexibility in respect of uses and applications, e.g. in the case of fluids with high viscosity, to compensate for leakage losses, to maintain pressure, to bridge the response time for pumps with variable delivery quantities or for cushioning purposes.

Because of their simple design, membrane accumulators OL – ELM are particularly suitable for secondary applications. They are available in different versions. The different types of design give flexibility in respect of uses and applications, e.g. in the case of fluids with high viscosity, to compensate for leakage losses, to maintain pressure, to bridge the response time for pumps with variable delivery quantities or for cushioning purposes.

Piston accumulators EHP are used where operating safety has the highest priority. With these accumulators safety can be monitored via various systems such as electronic end-of-stroke limits and ultrasound monitoring.

We are specialised in manufacturing customised accumulator stations and pressure vessels.
Taking account of customer-specific operating data OLAER calculates the necessary accumulator volumes using the accumulator design program and thus achieves the optimum solution for your specific application.

Accumulator stations with piston accumulators offer maximum safety when storing large volumes of oil. The use of downstream gas cylinders results in an increase in the oil volume ΔV and a smaller pressure difference Δp.
As a distribution partner of Roth Hydraulics we are happy to assist you with competent advice.

The maintenance free silicone accumulator has been developed specially for damping water hammering and pressure pulsations. By filling the vessels with silicon particle instead of nitrogen permeation can be avoided.
This also leads to longer service life of the bladder or membrane. Unlike gas filled accumulators, these vessels can be easily and completely emptied.

Pressure vessels are closed vessels. Their internal pressure is higher than the ambient pressure. Unlike pressure and transport vessels used to transport fluids in accordance with the transportation law, the pressure vessels must be installed at a fixed place before they can be put into operation.

The universal VG U and VG R tester and pressuriser unit is indispensible for checking, charging and draining the most commonly used hydraulic accumulators available on the market. It is screwed to the pressurizing valve on the accumulator and connected to the nitrogen source using a high-pressure hose that is fitted with a pressure-reducing valve, e.g. from our DRV range.
If the nitrogen only needs to be monitored or reduced, no hose is required.

Safety and shut-off units are used to enhance safety, block and balance the pressure of hydraulic accumulators and consumers. They meet the safety regulations for hydraulic accumulators in the various countries, in particular the pressure vessel regulations in force in Germany. Depending on the version, the presssure in the accumulator and/or consumers is balanced manually or electrically using a solenoid-operated two-way valve. A current control valve that regulates the amounts of pressure fluids in or out can also be installed.
The DI 20 size is also available in a fully stainless steel version.