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Reduction of Water Content in Biodegradable and Other Hydraulic Fluids
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English
Abstract
While the oxidation stability of environmentally friendly hydraulic fluids has been markedly improved, the controllability of hydrolysis is still poor. A research project IFAS has taken up this problem. The aim was to prevent the water entry and to diminish the water content of hydraulic fluids by changes in reservoir design and separation devices. An essential point of interest was the development of low-cost solutions suitable for the refit of existing mobile machines.
The ability to separate water is primarily determined by its degree of solubility in the respective fluid. The only method that will keep the water content in a hydraulic fluid far below its saturation point is vaporization into the surrounding atmosphere. An attractive application of this principle is the separation within the reservoir. The heat of the oil vaporizes the water, transporting it into the gas phase which may then be removed by exchange with the outside air.
The solutions developed in this project can be adapted to the conditions in the respective applications. By combination of single solutions both project aims can be joined. Thereby, a valuable contribution has been given to the safe operation of all types of hydraulic fluids.
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Topic
Citation
Kempermann, C. and Murrenhoff, H., "Reduction of Water Content in Biodegradable and Other Hydraulic Fluids," SAE Technical Paper 981497, 1998, https://doi.org/10.4271/981497.Also In
References
- Kirsch, B. Tumbrink, M. Fluidcontrolling Bans Water from Oil 269 278 proc. 10th International Colloquium Tribology Ostfildern/Germany
- Blok, P. The Management of Oil Contamination in Hydraulic Equipment Koppen&Lethem Andrijftechniek B.V. 1995
- Feßenbecker, A. New Additive for the Hydrolytic Stabilisation of Ester Lubricants 369 10th International Colloquium Tribology Ostfildern/Germany
- Investigations on the prevention of water entrance into rapeseed oil based hydraulic fluids and on the diminution of their water content Research project, IFAS Aachen University 1994-96
- Environmentally acceptable and biodegradable hydraulic fluid based on synthetic esters Research project, IFAS Aachen University 1993-96
- Readily biodegradable Pressure Media: Technical Demands