Hydraulic systems and powerpacks
Hydraulic systems and powerpacks are not only used in large series as is typically the case with construction machinery or in industry. Thanks to their reliable and durable technology, they are also used in individual projects to control powerful forces. Wandfluh powerpacks are available in a power range from 0.25 to 55 kW, with tank sizes between 3 and 1,500 l. Here are a few examples of projects implemented in close collaboration with customers.
Hydraulic turbine controller
Hydraulic controller for Francis turbines with redundant and easy-to-replace pump units. Double pressure filters enable filter elements to be replaced during running operation. The hydraulic control element is mounted on a 600 l tank and a stainless collecting tray. All electrical consumers are wired to a terminal box. Through intelligent layout and arrangement of the components, the overall system costs have been significantly reduced.
Hydraulic powerpack for water catchment
The hydraulic powerpack for water catchment controls inlet and outlet gates, de-sanders and other shut-off devices of the water catchment in a power station. Given the harsh environmental conditions at altitudes of more than 2,000 m, all pipes and sheet metal parts are made of stainless steel. With their special surface coatings, all hydraulic valves meet higher corrosion protection requirements. A pressure accumulator provides the energy to ensure continuous water catchment operation also in the event of temporary power failures. All electrical signals are wired to a control cabinet, so that a complete signal test can be performed already at the manufacturer's factory.
Hydraulic powerpack for controlling water supply
The hydraulic powerpack controls the inlet and bottom outlet gates of a river power station. The cylinders are operated in a differential switching mode, making it possible to use highly efficient pumps with compact design. The hydraulic valves are equipped with easy-to-operate manual overrides, making manual lowering with suction valves on the passive side easy in case of need. Wandfluh acted as the general contractor for this project and was responsible for the development and manufacture of the hydraulic powerpack as well as the layout, delivery and installation of cylinders and all the various pipes.
Explosion safe powerpack for use under and over water
The hydraulic powerpack controls the safe decoupling of the buoy of an FPSO Unit (Floating Production Storage and Offloading Unit), i.e. a floating oil platform. The use of the powerpack both, in an explosive environment over water as well as immersed in up to 20 m under water, requires the highest demands for explosion protection, corrosion protection as well as compliance with all the standards required in this case.
Hydraulic powerpack for controlling butterfly valves
The hydraulic powerpack for controlling butterfly valves is mounted on a 160 l tank and a stainless collecting tray. The tank and the oil collecting tray are painted in the colours specified by the customer. The display instruments showing oil and water pressures are clearly arranged on a panel. Double pressure filters enable filter elements to be replaced during running operation. Through intelligent layout and arrangement of the components, a very compact powerpack was produced.