New Pressure Reducing Valve Helps Minimizing Power Consumption and Improving Energy Efficiency of Hydraulic Systems for Wind Turbines

Date: 30 September 2012

HAVANT, UK … Diversified industrial manufacturer Eaton today introduced at HUSUM WindEnergy a pressure reducing valve specifically designed for wind energy applications. The additional function of the 1 PDC5 pressure reducing valve is its ability to keep the pressure of an accumulator stored for a long period of time without any significant leakage. Its performance characteristics help improve the energy efficiency of the wind turbine’s hydraulic system.

By reducing the number of times that the power pack has to start in order to maintain the pressure in the accumulator, the 1 PDC5 valve helps keep the power consumption of the hydraulic system of the wind turbine to a minimum by reducing the number of times the power pack has to start in order to maintain the pressure in the accumulator.

1 PDC5 features an intelligent design using a direct acting poppet with only two working ports. At low pressure, the pilot piston keeps the ball away from the valve seat. As pressure increases, the pilot piston is forced back against the spring until the ball sits on the seat. The inlet pressure can then rise up to the maximum system pressure. If the inlet pressure is removed, the ball will remain on the seat, maintaining the pressure in the accumulator for a long period of time without any significant leakage.

The valve was designed considering certain harsh environment applications. The seat, ball and casing are hardened, and help provide extended life time to the system.

“With these characteristics, Eaton’s 1PDC5 pressure reducing valve is attractive for accumulators in the hydraulic systems of wind turbines – and for any industrial application where leakage from accumulators or other pressurised hydraulic systems is critical,” said Maurice Ashmore, Eaton’s global chief engineer Screw-in-Cartridge Valves.

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Eaton’s Hydraulics business segment is a worldwide leader in the design, manufacture and marketing of a comprehensive line of reliable, high-efficiency hydraulic systems and components for use in mobile and stationary applications. Mobile and stationary markets include agriculture, alternative energy, construction, forestry, manufacturing, material handling, mining, oil and gas, processing, transportation and utility equipment. Eaton’s Hydraulics  business segment provides customer-driven solutions under product names such as Aeroquip®, Boston®, Char-Lynn®, Eaton®, Hydrokraft®, Hydrowa®, Hydro-Line®, Integrated Hydraulics®, SEL®, Synflex®, Vickers®, Walterscheid™, and Weatherhead®. For more information, visit

Eaton Corporation is a diversified power management company with more than 100 years of experience providing energy-efficient solutions that help our customers effectively manage electrical, hydraulic and mechanical power. With 2011 sales of $16.0 billion, Eaton is a global technology leader in electrical components, systems and services for power quality, distribution and control; hydraulics components, systems and services for industrial and mobile equipment; aerospace fuel, hydraulics and pneumatic systems for commercial and military use; and truck and automotive drivetrain and powertrain systems for performance, fuel economy and safety. Eaton has approximately 73,000 employees and sells products to customers in more than 150 countries. For more information, visit


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