13. Which oils may be used as a heat transfer fluid?

Basically, only oils specifically labelled as thermal oils may be used (e.g. hydraulic oils are not acceptable). The main criterion for the use of a thermal oil for a given temperature control unit is the maximum acceptable outlet and film temperatures provided by the manufacturer of the oil. Synthetic thermal oil should be used whenever possible.

Further Information: Temperature Control by Means of Fluid Media, 5th Edition, p. 99 and pp. 181-186. To order the book, see Answer 21.

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