Heat Transfer Fluid

Call 1-800-446-4910

Heat Transfer Fluid

Duratherm HF

  • "This will definitely be my go-to fluid for future projects." — Ryan Seward
  • "A few companies along the way have been helpful, but none like Duratherm." — K. Rose
  • "The difference between Calflo and Duratherm was amazing." — J. Gerbec
  • "We have had no issues with Duratherm versus the old oil we were using." — J. Cowger Jr.
  • "Yet another bonus was that the pricing was below comparable fluids." — S. Bailey Sr.
  • "Duratherm provides excellent heat transfer characteristics." — Ryan Seward
  • "I've had zero failures in over a year-and-a-half since using Duratherm." — R. Barnett
  • "The fluid is working better than expected." — Dick Livingston
  • "Duratherm is working great." — J. Cowger Jr.
  • "Our oxidation problems have disappeared." — H. Blair
  • "We have increased the time between oil changes and nearly eliminated any issues." — J. Smith
  • "Duratherm does not sludge up at all." — Bill Corbett
  • "Duratherm was one of the best moves we made. Working great!" — Neil McDivitt
  • "The heat transfer works better than any of the other fluids we have tried." — Lars Hvalby
  • "I would highly recommend this product over any other heat transfer fluid." — J. Cowger Jr.
  • "Duratherm saves money in the long run." — J. Smith
  • "The fluid is still clear … I can see the bottom of the tanks." — S. Bailey Sr.
  • "Duratherm is the best heat transfer fluid we've ever used." — Larry Daniels
  • "I've even recommended Duratherm to the equipment manufacturer." — Ed Slack
  • "This stuff is pretty amazing." — Ryan Seward
  • "Duratherm G is working excellently!" — Ian Smiley
  • "Duratherm HF has been performing remarkably well." — Raghu Kamath
  • "These products performed exceptionally well for us." — S. Poletto
  • "Duratherm XLT-120 is exactly what we needed!" — Luke Colby
  • "I commend you on the quality and longevity of your products." — H. Blair
  • "Duratherm 600 is the best fluid we’ve ever used!" — John Wanninger
  • "Duratherm is working great." — K. Rose

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 flash point. Engineered specifically for this purpose, its flash point 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 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 antioxidant 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 such as 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.

Downloads
Tools
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-659-78 740°F 393°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.

Technical Papers

Heat Transfer Fluid Basics

Selecting a Fluid

Using a Heat Transfer Fluid

Thank you!

The document you requested is on its way. If it doesn't arrive, you may need unblock emails and/or attachments from info@heat-transfer-fluid.com and request the document again.

Close this box