Heat Transfer Fluid
Duratherm HTO
- "Our oxidation problems have disappeared." — H. Blair
- "Duratherm was one of the best moves we made. Working great!" — Neil McDivitt
- "Duratherm saves money in the long run." — J. Smith
- "The difference between Calflo and Duratherm was amazing." — J. Gerbec
- "I would highly recommend this product over any other heat transfer fluid." — J. Cowger Jr.
- "I commend you on the quality and longevity of your products." — H. Blair
Duratherm HTO heat transfer oil is engineered for precise and efficient temperature control up to 600°F (315°C) and is a budget solution where heat transfer applications require an environmentally friendly, low cost fluid to meet today’s fast paced production demands.
Application
Engineered for many years of service, it’s ideal for a wide range of closed to atmosphere (inertly sealed) applications including paint, rubber, paper mill calendars, board plants, roofing, textiles, laundry, refineries and asphalt production.
The Difference
Duratherm HTO’s use of highly refined base stocks ensures excellent thermal stability. Its low volatility also minimizes vapor pressure at elevated temperatures and unlike most other fluids in its class, Duratherm HTO contains antioxidants*, metal deactivators and corrosion inhibitors to further enhance the fluid’s longevity and help protect your system.
*For critical applications where high levels of oxidation are prevalent please consider Duratherm 600.
Environmental
Duratherm HTO is environmentally friendly, non-toxic, non-hazardous and non-reportable. Duratherm HTO poses no ill effect to worker safety.
Disposal
After its long service life it can easily be disposed of with other waste oils. Duratherm supports recycling and encourages oil reclaimation programs where possible.
System Cleaning
In our effort to truly service the heat transfer industry, we have developed four unique and specific heat transfer system cleaners. Ranging from preventative maintenance system cleaners to emergency downtime system revivers, we have a cleaner that fits your needs and schedule.
Tools
| Duratherm HTO Properties | ||
|---|---|---|
| Appearance: clear and bright liquid | ||
| Maximum bulk/use Temp. | 600°F | 315°C |
| Flash Point ASTM D92 | 405°F | 207°C |
| Fire PointASTM D92 | 434°F | 223°C |
| Autoignition ASTM E-659-78 | 680°F | 360°C |
| ViscosityASTM D445 | ||
| cSt at 104°F / 40°C | 40 | |
| cSt at 212°F / 100°C | 6.5 | |
| cSt at 600°F / 316°C | 0.7 | |
| Pour Point ASTM D97 | 5°F | -15°C |
| Density ASTM D1298 | lb/ft3 | g/ml |
| at 100°F / 38°C | 52.5 | 0.842 |
| at 500°F / 260°C | 43 | 0.688 |
| at 600°F / 316°C | 40.7 | 0.652 |
| Average Molecular Weight | 371 | |
| Carbon Residue ASTM D189 | 0.005 | % Mass |
| Sulphur ContentX-RAY | <.001 | weight % |
| CU Strip Corrosion ASTM D130 | 1a | |
| Thermal Expansion Coefficient | 0.0564 %/°F | 0.1011 %/°C |
| Thermal Conductivity | BTU/hr F ft | W/m K |
| at 100°F / 38°C | 0.081 | 0.141 |
| at 500°F / 260°C | 0.074 | 0.130 |
| at 600°F / 316°C | 0.073 | 0.127 |
| Heat Capacity | BTU/lb F | kJ/kg K |
| at 100°F / 38°C | 0.465 | 1.907 |
| at 500°F / 260°C | 0.634 | 2.653 |
| at 600°F / 316°C | 0.673 | 2.819 |
| Vapor Pressure ASTM D2879 | psi | kPa |
| at 100°F / 38°C | 0.00 | 0.00 |
| at 500°F / 260°C | 0.47 | 2.78 |
| at 600°F / 316°C | 2.30 | 11.89 |
| Distillation Range ASTM D2887 | 10% | 702°F (372°C) |
| 90% | 852°F (455°C) | |
| * Maximum Film Temp. | 630°F | 332°F |
*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