Quick Facts

  • Budget fluid for closed systems
  • High flashpoint
  • Non-Toxic, non-Hazardous

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Duratherm HTO Heat Transfer Fluid

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.

Duratherm HF 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 are typical of normal production. They do not constitute a specification

What they're saying...

"The heat transfer appears to be the best it's ever been " — R. Barnett

"You manufacture products that perform exactly as advertised, which is not always the case in the marketplace." — H. Blair

" We used to use Paratherm ... it had a tendency to sludge up. I noticed with Duratherm though that it does not sludge up at all." — B. Corbett

"We were thoroughly impressed with DuraClean Ultra. The system was spotless, and all of the hard build-up was completely removed in only 6 hours" — M. Fransiscovich

"You proved once again that while your goal is to grow. It's through honest customer service and great products." — K. Rose

"The oil still looks as clear as it did when we first put it into use." — J. Thomas

In only two weeks the hard pieces of burnt oil (COKE) had liquefied and we were able to clean the lines out with just air pressure. — E. Disanto