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xxx 2013-10-09

Safe on the High Seas - Compact hydraulic manifolds ensure safe performance of winches

Safe on the High Seas - Compact hydraulic manifolds ensure safe performance of winches

Source: Damen Shipyards Group

Anchoring of ships or depositing of cargo on the bottom of the sea – the potential uses for winches in marine and offshore areas are extremely varied. Safety is always the highest priority. With an additionally included valve in the control manifold DSE by Rexroth, the retention forces are maintained even when the brake is inactive. The compact construction type reduces costs and installation effort for the user.

With regard to winches the safety aspect is of utmost importance. If, for example, the hydraulics supply to the winch is interrupted without activation of a brake, in the worst case the load on the hook can fall uncontrollably. To guarantee safety even in these cases, Rexroth installed an additional valve that reacts to falling oil pressure. It keeps the oil in the hydraulic motor and thus prevents oil from escaping into the tank. While the motor will rotate slowly, it will not cavitate and the holding forces will be maintained. The user can select between multi-disk brakes and a brake band, which affects the edge of the winch drum. An automatic brake release function with integrated pressure reduction valve is available to release the brake.

The winch control valves of the DSE product line can be installed directly on the motor without the need for pipes or hoses. Thus, the manufacturer does not only save costs, but also installation effort. Eliminating the lines also avoids the risk of leaking hoses, pipes or couplings.

With a possible flow through of 60 to 700 l/min and a maximum pressure of 250 bars, the product line is primarily suitable for use with larger winches. Thanks to the modular design, the suitable control manifold can be adopted to the customer's requirements. Functions such as self-centering, operation with two speeds and mooring can be easily added to the main manifold.

About Bosch Rexroth:

Economical, precise, safe, and energy efficient: drive and control technology from Bosch Rexroth moves machines and systems of any size. The company bundles global application experience in the market segments of Mobile Applications, Machinery Applications and Engineering, Factory Automation, and Renewable Energies to develop innovative components as well as tailored system solutions and services. Bosch Rexroth offers its customers hydraulics, electric drives and controls, pneumatics, gear technology, and linear motion and assembly technology all from one source. With locations in over 80 countries, more than 37,500 associates generated sales revenue of approximately 6.5 billion euros ($8.4 billion) in 2012.

To learn more, please visit

About Bosch:

In the U.S., Canada and Mexico, the Bosch Group manufactures and markets automotive original equipment and aftermarket solutions, industrial drives and control technology, power tools, security and communication systems, packaging technology, thermotechnology, household appliances, solar energy, healthcare telemedicine and software solutions. Having established a regional presence in 1906, Bosch employs nearly 24,600 associates in more than 100 locations, with consolidated sales of $10.6 billion in fiscal year 2012. For more information, visit, and

The Bosch Group is a leading global supplier of technology and services. In fiscal 2012, its roughly 306,000 associates generated sales of $67.5 billion. Since the beginning of 2013, its operations have been divided into four business sectors: Automotive Technology, Industrial Technology, Consumer Goods, and Energy and Building Technology. The Bosch Group comprises Robert Bosch GmbH and its roughly 360 subsidiaries and regional companies in some 50 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for further growth. Bosch spent some $6.1 billion for research and development in 2012, and applied for nearly 4,800 patents worldwide. The Bosch Group’s products and services are designed to fascinate, and to improve the quality of life by providing solutions which are both innovative and beneficial. In this way, the company offers technology worldwide that is “Invented for life.” Additional information is available online at and


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