duratherm heat transfer fluids

Duratherm HF-FG

A food grade fluid engineered for its high flash point of 276°C (530°F) with operating limit of 337°C (640°F), Duratherm HF offers a solution to those requiring the additional level of safety needed to meet internal safety, insurance or government regulations while also meeting USDA requirements for incidental food contact. It is NSF registered HT1, and meets the requirements of 21CFR1783570.



Duratherm HF-FG satisfies the need for a high flash point thermal fluid while meeting the stringent requirements of the food processing and related industries. With a maximum bulk temperature of 338ºC (640ºF) and a flash point of 276ºC (530ºF) Duratherm HF-FG is ideally suited for the rigorous high temperature applications found in the food industry. Please consult your equipment manufacturer or Duratherm to ensure Duratherm HF-FG is suitable for your system.


Not only does Duratherm HF-FG have one of the highest flash points available it also contains the industry’s most effective and resilient blend of additives to ensure long-lasting, trouble free service. Our exclusive system includes a proprietary, dual-stage anti-oxidant and a special blend of metal deactivators, extenders, and other agents that prolong fluid life and help keep systems clean. That also means longer life for parts like pumps and rotary seals.


Oxidation can cripple your system. Left unchecked, it will ultimately cause catastrophic failure and costly downtime. That’s why Duratherm HF-FG offers unsurpassed levels of protection against oxidation, and a service life that other fluids simply can’t match.


Duratherm HF-FG delivers superior resistance to sludging, a problem plaguing most other fluids. That makes it the best defense against extreme oxidation found in many of today’s demanding manufacturing environments, including plastics processing, molding, casting, asphalt, paint, chemical and a wide variety of other applications.


Duratherm HF-FG is environmentally friendly, nontoxic, non-hazardous and non-reportable. It meets the food grade requirements of FDA 21CFR1783570 and USDA H1. It poses no ill effect to worker safety and does not require special handling. After its long service life, Duratherm HF-FG heat transfer oil can easily be disposed of with other waste oils. LESS
Note: The values quoted in the table above are typical of normal production. They do not constitute a specification.

    Quick Facts

    • Rated to 338°C (640°F)
    • Industry’s highest flash point
    • Non-toxic/non-hazardous
    • Resists oxidation and sludging
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