Denley Hydraulics was presented the challenge of producing a test rig capable of delivering from 15 to 150 litres of oil per minute at a pressure of up to 250 bar. Not only this but it had to supply the oil at 120°C (248°F). Due to the low viscosity a checkball pump and variable speed drive (VSD) were selected. Many of the components were specials as the combination of flow, pressure and temperature made choice limited.
The Hydraulic test rig was comprised of two parts. A hydraulic power unit with a 37 kW motor, heaters and a cooling/filtration circuit, and a test chamber with digital readouts and also connections for client specified test equipment. This was done so that the operator was not subject to excessive noise. The test chamber was also fitted with oil mist extraction for optimal visibility. The sump of the test chamber was fitted with level control to automatically cut in/out when required.