Many hydraulic power units still work with constant motor and pump speeds. However, variable-speed pump drives allow application designers to realise energy savings of up to 70 % at only slightly higher investment costs. Once in use, the investment will pay for itself in less than a year in the form of reduced energy consumption. In addition, hydraulic power units with variable speed drives generate less heat, reduce wear and consume less oil, which further increases the availability and reliability of your machines and systems. Our white paper on “Planning and operating hydraulic power units to provide greater energy efficiency” contains background information, best practices and practical examples for the implementation of fluid control applications with variable speed drives.