Second quarter 2006Hydraulic systems & components
Surveillance
Healthcare (Industry)
An hydraulic system for demanding applications such as forestry cranes, refuse vehicles, municipal vehicles and salt spreaders - all needing separate flows of differing capacities - will be a complicated affair when built traditionally using a single pump, a flow divider and lots of other essential auxiliary equipment. To achieve the capacity needed to run the vehicle's different functions, a single-pump system must be substantially oversized - resulting in heat losses, increased wear and higher fuel consumption.
The solution to this dilemma is to simply use a twin flow pump, providing each function with precisely the amount of fluid needed, and this even applies to open centre systems. Losses are radically reduced by avoiding unnecessary circulation, and there is no need for a fluid cooler. Flow limiters are eliminated, and the simpler system layout means fewer hoses and fewer connectors. The end result is longer service life from all system components - especially hoses, seals and the hydraulic fluid itself.
Savings generated by the simplicity of the system, easier installation and lower running costs quickly make up for the difference in initial cost. Fuel savings alone can amount to as much as 5 litres per hour. The simple system layout also contributes to savings by minimising future maintenance needs.
Parker's F2-series is based on the bent-axis-principle to achieve high efficiency and a compact installation envelope. The company now offers two new sizes in addition to its F2-53/53 and F2-70/35 pumps: The F2-42/42 and the F2-55/28. Client application needs and PTO gearing will be what determines which one is best for the application.
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