Mineral oils are products distilled and refined from crude oil. These do not consist of precisely defined constituents but rather consist of a complex mixture. Depending on the distribution of the hydrocarbons and the dominance of certain properties, mineral oils are grouped according to paraffin-base, naphthenic and aromatic. For the purpose of attaining especially low ultimate pressures, select mineral oil based on the manufacturers recommendations for your specific pump.
The thermal and chemical resistance of mineral oils has been found to be adequate in the majority of applications. They offer a high degree of compatibility with elastomers and resistance to hydrolysis.
Examples of use:
Standard oil for low ultimate pressures. Used for pumping air, chemically inert gases and water vapour.
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