Innovative hydraulic accumulator for hydraulic hybrid drives HYDAC Double Piston Accumulators (DKS-System) are hydro-pneumatic accumulators.  They exploit the full potential of high-pressure accumulators. With their enormous power density and the advantages of their construction, they are best choice for hydraulic hybrid propulsion. The strength of hydraulic hybrid systems therefore lies in the power density, meaning the characteristic of being able to implement quantities of energy within very short intervals of time. This is a robust, tried and tested drive technology.In opposite to standard piston accumulators, the HYDAC double piston accumulators have the following advantages: Exhaustion of the full potential for accumulation and performancePerfect energy balanceCompact designLow weightThe pressure on the suction side of hydrostats remains constantIdeal suction conditions on the displacement unit Due to the permanent coupling of the high pressure and low pressure chambers, only one side of the accumulator needs to be monitored with reference to the filling level or the piston stroke. This makes the oil management or feed after volumetric losses far easier.The HYDAC pouble piston accumulators guarantee optimum suction conditions on hydraulic hybrid system motor-pump units as, in contrast to conventional high pressure - low pressure systems, the pressure on the suction side remains constant. This means that no additional feed pumps are required.Double piston accumulators increase the energy capacity and the implementable performance in comparison to conventional high pressure - low pressure accumulator systems. 

Filter Elements and Filtration Solutions for Wind Turbines

Control modules in individual design for your hydraulic drives.

Continuous Fluid Monitoring on Hydraulic Test Rigs

The in the  Journal of Fluid Power "O + P", Edition 3 / 2010 published article "Hydraulic Solutions based on electronics" is now available as HYDAC Special Edition in German and English language:

Machine safety

Heavy diesel engines are not only used in  power plants.  They also lie at the heart of large ships such as container ships or cruise ships (AIDAaura, AIDAvita).  Often each cylinder on these engines has its own injection pump.  During the injection process, rhythmical pressure pulsations can occur which places stress on the whole fuel system and all the integrated components.  These pulsations are reduced or eliminated by using the HYDAC Metal Bellows Accumulator.  With the HYDAC Metal Bellows Accumulator, instead of a bladder or diaphragm, a metal bellows is used as the flexible separating element between fluid and gas.  In comparison with conventional solutions, the metal bellows  accumulator has the following distinct advantages:  The metal bellows is practically gas-tight Resistance to all conventional fuels Resistance at high temperatures up to 160°C, also Reduction maintenance and monitoring to a minimum Increase in availability of entire system  With its new development HYDAC has produced a cost-effective damper which is without rival in terms of maintenance and service. It increases the availability of the entire system.  You save money and the purchase costs will be repaid within a short time.  Above all the HYDAC Metal Bellows Accumulator represents a new type of accumulator to complement the tried and tested bladder, piston and diaphragm accumulators in the HYDAC Technology GmbH product range and therefore closes the gap of gas-tight accumulators