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FRAGOLTHERM® FG-35 is a heat transfer fluid based on hydrogenated mineral oils that is used in a range of -15 °C to 325 °C. The maximum permissible film temperature is 345 °C.
FRAGOLTHERM® FG-35 has been classified by the NSF as “HT1”, i.e. it is approved for applications in which unintended contact with food may occasionally arise.
Despite good thermal stability and a low tendency to oxidise, it is advisable a nitrogen blanket in the expansion tank during use in high temperature ranges, in order to prevent premature ageing.