Heat Transfer Fluid

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Heat Transfer Fluid

Duratherm HF

  • "Our oxidation problems have disappeared." — H. Blair
  • "I've even recommended Duratherm to the equipment manufacturer." — Ed Slack
  • "These products performed exceptionally well for us." — S. Poletto
  • "Duratherm saves money in the long run." — J. Smith

Duratherm HF heat transfer fluid satisfies the needs of industry and insurance officials who recommend operating systems at temperatures below the heat transfer fluid’s flashpoint. Engineered specifically for this purpose, its flashpoint is one of the industry’s highest at 530° F (276°C).

The Difference

Not only does Duratherm HF heat transfer oil have one of the highest flashpoints 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.

Lasts Longer

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

Runs Cleaner

Duratherm HF heat transfer oil 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.

Environmental

Duratherm HF heat transfer oil is environmentally friendly, non-toxic, non-hazardous and non-reportable. It poses no ill effect to worker safety and does not require special handling. After its long service life, Duratherm HF heat transfer oil can easily be disposed of with other waste oils.

System Cleaning

If your existing fluid has let you down and left you with a system full of sludge or carbon, we’ve developed a full line of heat transfer system cleaners to get your system back to like-new condition. Contact us for complete details.

Duratherm HF Properties
Appearance: colorless, clear and bright liquid
Maximum bulk/use Temp. 640°F 338°C
Flash Point ASTM D92 530°F 276°C
Fire PointASTM D92 582°F 305°C
Autoignition ASTM E-659-78 830°F 443°C
ViscosityASTM D445  
cSt at 104°F / 40°C 103  
cSt at 212°F / 100°C 10.45  
cSt at 600°F / 316°C 0.81
Pour Point ASTM D97 15°F -9°C
Density ASTM D1298 lb/ft3 g/ml
at 100°F / 38°C 53.85 0.862
at 500°F / 260°C 44.1 0.706
at 600°F / 316°C 41.9 0.671
Average Molecular Weight 399
Carbon Residue ASTM D189 0.005 % Mass
Sulphur ContentX-RAY <.001 weight %
CU Strip Corrosion ASTM D130 1a  
Thermal Expansion Coefficient 0.0562 %/°F 0.1011 %/°C
Thermal Conductivity BTU/hr F ft W/m K
at 100°F / 38°C 0.082 0.141
at 500°F / 260°C 0.075 0.129
at 600°F / 316°C 0.074 0.128
Heat Capacity BTU/lb F kJ/kg K
at 100°F / 38°C 0.445 1.863
at 500°F / 260°C 0.618 2.587
at 600°F / 316°C 0.663 2.745
Vapor Pressure ASTM D2879 psi kPa
at 100°F / 38°C 0.00 0.00
at 500°F / 260°C 0.24 1.65
at 600°F / 316°C 1.84 12.69
Distillation Range ASTM D2887 10% 769°F (410°C)
  90% 930°F (499°C)

*The values quoted in the table above are typical of normal production. They do not constitute a specification.

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