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.
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 | 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.
Technical Papers
Heat Transfer Fluid Basics
- Understanding Fluid Degradation
- Understanding Flash, Fire and Auto Ignition Points
- Avoiding Oxidation and Thermal Degradation
Selecting a Fluid
- Thermal Fluid Selection Guide for Systems Under 250 Gallons
- Thermal Fluid Selection Guide for Systems Over 250 Gallons
- Open Baths and Heat Transfer Fluids