The standard DVA-Power Packs are hydraulic variable speed driven units based on the HYDAC KineSys DVA-Kits to provide an efficient amount of pressure. The required flow gets supplied on demand only and in case of downtimes or clamping function where there is not much flow needed, the inverter ramps down the speed or switches the motor off completely and minimum oil leakage is compensated by the diaphragm accumulator.