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Bucher Hydraulics Industrial Vechicle Technology Fluid Power – Next Regeneration

Compact, Cylindrical Pipe-rupture Valves That Help to Deliver Energy Efficiency Improvement Can Also Improve Both Reliability and Safety in a Variety of Machine Applications.

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Compact, Cylindrical Pipe-rupture Valves That Help to Deliver Energy Efficiency Improvement Can Also Improve Both Reliability and Safety in a Variety of Machine Applications.

The construction sector is one of the most important user areas for Bucher Hydraulics’ safety valves, with the company providing highly competitive components for the safety of earthmoving and construction plant. Based on decades of experience in the design, development and manufacture of safety valves, and on its special innovative spirit and close cooperation with its customers, Bucher offers an extensive product portfolio with advanced and forward-looking solutions. The spectrum ranges from application proven standard safety valves up to a safety valve that features the additional built-in benefit of energy regeneration.

High levels of safety and functionality coupled with compact design are some of the most important requirements in mobile applications. Safety valves are a major factor in global competitiveness, where the focus is on high-performance machines with high levels of availability. With its extensive range, Bucher Hydraulics is not only handling the differing requirements of mobile applications in a systematic manner, but is also optimizing the overall system in partnership with the user. Customer support extends from joint project development via implementation and customization of the valves right through to commissioning. In connection with more stringent exhaust-emission regulations, for example, this led to the strategy of integrating energy regeneration into the safety valves.

bucher_safety_valves_ivt_2016Energy savings included
The Cindy-Reg series is the result of this development work. ‘Reg’ stands for regeneration, because the valve systematically focuses on energy efficiency in the safety circuit and delivers energy savings of up to 25%. In its application, the functionality of the valve extends far beyond that of the conventional excavator pipe-rupture valve. The valve controls the load over the entire speed range.

In addition, the innovative solution differs from previous designs in that no additional energy source is required to retract the cylinder. Instead of a conventional counterbalance valve or excavator pipe-rupture function to control the lowering operation, a counterbalance valve with additional functionality is now used. Its intelligent regeneration concept allows the direct infeed of part of the oil flow into the opposite side of the cylinder. When this volume is filled, the surplus oil flow is routed to tank with no significant back-pressure. The system thus significantly reduces the demand for pump flow, which – depending on the system – can then be available for other functions.

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bucher_schematicsAs an additional feature, the Cindy-Reg safety valve offers energy recover directly at the cylinder, which saves up to 25% of the energy.

Read more at: Industrial Vehicle Technology International 2017 – Off Highway Edition| Section 3:  Fluid Power 

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