- "Duratherm saves money in the long run." — J. Smith
- "I've even recommended Duratherm to the equipment manufacturer." — Ed Slack
- "We have had no issues with Duratherm versus the old oil we were using." — J. Cowger Jr.
- "I've had zero failures in over a year-and-a-half since using Duratherm." — R. Barnett
- "Duratherm provides excellent heat transfer characteristics." — Ryan Seward
- "Yet another bonus was that the pricing was below comparable fluids." — S. Bailey Sr.
- "Duratherm is working great." — K. Rose
- "Duratherm is the best heat transfer fluid we've ever used." — Larry Daniels
- "This stuff is pretty amazing." — Ryan Seward
- "Duratherm HF has been performing remarkably well." — Raghu Kamath
- "The fluid is still clear … I can see the bottom of the tanks." — S. Bailey Sr.
- "A few companies along the way have been helpful, but none like Duratherm." — K. Rose
- "Duratherm G is working excellently!" — Ian Smiley
- "The heat transfer works better than any of the other fluids we have tried." — Lars Hvalby
- "We have increased the time between oil changes and nearly eliminated any issues." — J. Smith
- "I would highly recommend this product over any other heat transfer fluid." — J. Cowger Jr.
- "Duratherm is working great." — J. Cowger Jr.
- "Our oxidation problems have disappeared." — H. Blair
- "Duratherm does not sludge up at all." — Bill Corbett
- "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 XLT-120 is exactly what we needed!" — Luke Colby
- "This will definitely be my go-to fluid for future projects." — Ryan Seward
- "Duratherm was one of the best moves we made. Working great!" — Neil McDivitt
- "These products performed exceptionally well for us." — S. Poletto
- "The fluid is working better than expected." — Dick Livingston
- "The difference between Calflo and Duratherm was amazing." — J. Gerbec
Duratherm S heat transfer fluid is ideal for applications such as negative pressure mold heaters, annealing tanks, open bath forming, or any processing equipment where oxidation is prevalent and problematic. Duratherm S heat transfer fluid resists the effects of oxidation seen with most other heat transfer fluids.
High-temperature stability is maintained to 650°F.This combined with a low end working temperature of -40°F also makes Duratherm S heat transfer fluid ideally suited for low-temperature applications, batch processing or any application requiring a single fluid for both heating and cooling.
Duratherm S is an extremely oxidative and thermally stable heat tranfer fluid offering precise temperature control in applications requiring the highest level of oxidative stability with high- and low-termperature workability.
- Superior oxidation resistance∗ (virtually unaffected)
- Non-fouling - extremely long life
- Low odor
- Extremely high working temperature (650°F)
- Extremely low working temperature (-40°F)
Duratherm S heat transfer fluid is a high-performance, extremely stable, long-lasting silicone-based heat transfer fluid.
Virtually unaffected by oxidation∗, Duratherm S heat transfer fluid is perfect for use in a variety of applications requiring a safe, non-reportable, non-toxic and non-corrosive heat transfer fluid.
∗Call for application recommendations.
|Duratherm S Properties|
|Appearance: clear liquid, slight yellow tint|
|Maximum bulk Temp. (Closed System)||650°F||343°C|
|Maximum bulk Temp. (Open System)||400°F||204°C|
|Flash Point ASTM D92||615°F||323°C|
|Fire Point ASTM D92||636°F||335°C|
|Autoignition ASTM E-659-78||818°F||436°C|
|Viscosity ASTM D445|
|cSt at -58°F / -50°C||334.2|
|cSt at -13°F / -25°C||177.4|
|cSt at 100°F / 38°C||37.5|
|cSt at 212°F / 100°C||17.4|
|cSt at 500°F / 260°C||4.4|
|cSt at 600°F / 316°C||3.3|
|Pour Point ASTM D97||-87°F||-66°C|
|Density ASTM D1298||lb/ft3||g/ml|
|at 100°F / 38°C||59.7||0.956|
|at 500°F / 260°C||53.4||0.855|
|at 600°F / 316°C||51.8||0.829|
|Carbon Residue ASTM D189||0.01||% Mass|
|Sulphur Content X-RAY||<.001||weight %|
|Thermal Expansion Coefficient||0.055 %/°F||0.105 %/°C|
|Thermal Conductivity||BTU/hr F ft||W/m K|
|at 0°F / -17°C||0.081||0.140|
|at 100°F / 38°C||0.075||0.129|
|at 300°F / 148°C||0.061||0.105|
|at 500°F / 260°C||0.048||0.083|
|at 600°F / 316°C||0.042||0.072|
|Heat Capacity||BTU/lb F||kJ/kg K|
|at 0°F / -17°C||0.382||1.599|
|at 100°F / 38°C||0.403||1.687|
|at 300°F / 148°C||0.449||1.879|
|at 500°F / 260°C||0.495||2.072|
|at 600°F / 316°C||0.518||2.168|
|Vapor Pressure ASTM D2879||psi||kPa|
|at 100°F / 38°C||0.00||0.00|
|at 500°F / 260°C||0.30||2.06|
|at 600°F / 316°C||1.01||6.96|
*The values quoted in the table above are typical of normal production. They do not constitute a specification.
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