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RELATHERM UHT Ultra-High Temperature Heat Transfer Fluid

Well proven synthetic thermal fluid chemically equivalent to Therminol® VP-1 and Dowtherm® A. It is a eutectic mixture of Diphenyl Oxide (DPO) and Biphenyl. A liquid-gas phase heat transfer fluid designed for ultra-high temperature applications, it maintains excellent thermal stability and pumpability over its specified bandwidth .   It is a cost-effective alternative to name-brand aromatic fluids of the same chemistry.

PRODUCT SUMMARY

  • Maximum use temperature: 400ºC / 750°F
  • Flash Point: 124ºC / 255°F
  • Resistant to fouling and solids/coke formation
  • Excellent thermal stability
  • Top-off compatible with Therminol® VP-1 and Dowtherm® A. No flush required.

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Fun Facts
  • Relatherm lasts longer than most industry fluids. Read more.
  • Our system cleaners are super effective. Read more.
  • Relatherm offers the most comprehensive preventative maintenance program for heat transfer fluids. Read more.
  • Relatherm offers the largest selection of thermal fluids in the market. Read more.
  • Relatherm can help with the recycling and reclamation of synthetic thermal fluids. Read more.
  • Physical Properties
  • Additional Information
Physical Properties
AppearanceClear, water white liquid
CompositionBiphenyl/diphenyl oxide (DPO), Eutectic Mixture
Maximum bulk temperature400°C /750°F
Maximum film temperature430°C / 800°F
Normal Boiling Point257°C / 495°F
Crystallization Point12°C / 54°F
Flash Point
COC (ASTM D92)124°C / 255°F
PMCC (ASTM D93)110°C / 230 °F
Autoignition Temperature (ASTM E659)601°C /1114 °F
Autoignition Temperature (DIN 51794)621°C/1150 °F
Coefficient of thermal expansion @200°C0.000979 /°C (0.000544 /°F)
Heat of Vaporization*206 kJ/kg (88.7 Btu/lb)
Kinematic Viscosity
at 100°C/ 212°F (ASTM D 445)0.99 cSt, mm2/s
at 40°C/ 104°F (ASTM D 445)2.48 cSt, mm2/s
Liquid Density
at 15°C (ASTM D 4052)1068 kg/m3 (8.91 lb/gal)
at 25°C (ASTM D 4052)1060 kg/m3 (8.85 lb/gal)
Acidity, ASTM D 664<0.2 mg KOH/g
Average Molecular Weight 166
Pseudocritical temperature499°C / 930 °F
Pseudocritical pressure33.1 bar (480 psia)
Pseudocritical density327 kg/m3 (20.4 lb/ft3)
Sulfur Content (ASTM D-7691)<10 ppm
Copper Corrosion (ASTM D 130)<<1a
Max. Moisture Content (ASTM E-203)300 ppm
Volume contraction upon freezing6.27%
Volume expansion upon melting6.69%
Surface Tension (25°C)**36.6 dynes/cm
Dielectric Constant (23°C), ASTM D-9243.35
Additional Information

WHY RELATHERM UHT?

Relatherm UHT is one of the most stable heat transfer fluids in the industry. It maintains excellent thermal properties at ultra-high process temperatures, providing dependable and trouble-free equipment operation. It can be used as a liquid heat transfer fluid or as a boiling-condensing heat transfer fluid up to 400ºC / 750°F in applications requiring very precise temperature control.

COMPREHENSIVE PRODUCT PORTFOLIO

If Relatherm UHT does not meet your application requirements, there is a very good chance that we will be able to offer a better suited solution from our comprehensive portfolio of thermal fluids and system cleaners. Contact us to discuss your application with a Thermal Fluids Expert.

MAXIMUM OXIDATION RESISTANCE

Relatherm UHT provides a very high level of resistance to oxidation and greatly minimizes sludge format and the fouling of heat transfer surfaces.

For this reason, Relatherm UHT provides lower maintenance costs, longer uptime and less frequent fluid changeouts.

EXTENDED FLUID LIFE

Relatherm UHT is well known for it extended service life, even in oxidation-prone systems. Its superior base chemistry extends its usability under operating conditions at which other industry fluids would typically degrade.

Relatherm Heat Transfer Fluids offers a complete line of premium Heat Transfer Fluids and System Cleaners for all industrial applications.

P.O.Box 57874 Jacksonville,FL, 32241
Phone: 1-800-387-0406
Email: hello@relatherm.com
Products
  • RELATHERM UHT
  • RELATHERM VHT
  • RELATHERM HT-1
  • RELATHERM HT-2
  • RELATHERM HT-3
  • RELATHERM FG-1
  • RELATHERM FG-2
  • RELATHERM FG-3
  • RELATHERM MT
  • RELATHERM MT-FG
  • RELATHERM PAG
  • RELATHERM S-1
  • RELATHERM S-2
  • RELATHERM S-LT
  • RELATHERM S-FG
  • RELATHERM O
  • RELATHERM DX-1
  • RELATHERM LT
  • RELATHERM VLT
  • RELATHERM ULT
  • RELACLEAN
  • RELACLEAN FG
  • RELACLEAN SC
  • RELACLEAN LC
  • RELAFLUSH
  • RELAFLUSH S
  • R-CLEAN
  • RELATHERM EG
  • RELATHERM PG
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Relatherm Heat Transfer Fluids 2023
A business of AllStar Thermal Products LLC.
  • Home
  • About Us
  • Products
    • Heat Transfer Fluids
    • System Cleaners
    • Products by Temperature Range
    • Products by Industry / Application
    • Products by Intended Use
    • Products by Fluid Type / Chemistry
  • The Relatherm Difference
    • Advanced Additive Technology
    • Advanced Research & Development
    • Top-Notch Technical Support
    • Top Notch Customer Service
    • Free Fluid Testing & Analysis
    • Competitor Fluid Comparisons
    • Customer Success Stories
  • Tools
    • Find your Fluid
    • Cross-Reference Industry Fluids
    • Compare Industry Fluids
    • Engineering Calculators
  • Technical Resources
    • Product Documentation (TDS & SDS)
    • Maintenance & Troubleshooting
    • Equipment Operation
    • Engineering Design
    • Case Studies & White Papers
    • Useful Industry Links
    • Glossary
  • Thermofluid Care Program
    • Fluid Testing & Analysis
    • Heat Transfer Fluid Reclamation & Recycling
    • Engineering Design & Field Support
  • Contact Us
  • Request a Quote
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