A cargo ship has a hydraulic power unit (HPU) that opens and closes several hatch doors on grain-storage areas. The accompanying schematic shows a circuit for one of eight cylinders and valves located close to the doors, with the HPU on a lower deck. The HPU is located midway between two sets of four. The pressure and return lines run approximately 200 ft. in each direction...
Register or Sign in below to download the full article in .PDF format, including high-resolution graphics and schematics when applicable.