| Appearance | Clear, pale yellow liquid |
| Composition | Modified terphenyl |
| Maximum bulk temperature | 345°C (650°F) |
| Maximum film temperature | 375°C (705°F) |
| Normal boiling point | 359°C (678°F) |
| Pumpability, at 300 mm2/s (cSt) | 11°C (52°F) |
| Pumpability, at 2000 mm2/s (cSt) | -3°C (27°F) |
| Flash point, COC (ASTM D-92) | 184°C (363°F) |
| Flash point, PMCC (ASTM D-93) | 170°C (338°F) |
| Autoignition temperature (ASTM E-659) | 374°C (705°F) |
| Autoignition temperature (DIN 51794) | 399°C (750°F) |
| Pour point (ISO 3016) | -32°C (-25°F) |
| Minimum liquid temperatures for fully developed turbulent flow (NRe > 10000) | |
| 10 ft/sec, 1 in tube (3.048 m/s, 2.54 cm tube) | 72°C (162°F) |
| 20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube) | 53°C (128°F) |
| Minimum liquid temperatures for transitional region flow, (NRe > 2000) | |
| 10 ft/sec, 1 in tube (3.048 m/s, 2.54 cm tube) | 35°C (96°F) |
| 20 ft/sec, 1 in tube (6.096 m/s, 2.54 cm tube) | 26°C (78°F) |
| Coefficient of thermal expansion at 200°C | 0.000819/°C (0.000455/°F) |
| Kinematic viscosity at 100°C (ASTM D-445) | 3.80 mm2/s (cSt) |
| Kinematic viscosity at 40°C (ASTM D-445) | 29.6 mm2/s (cSt) |
| Liquid density at 15°C (ASTM D-4052) | 1012 kg/m3 (8.44 lb/gal) |
| Liquid density at 25°C (ASTM D-4052) | 1005 kg/m3 (8.40 lb/gal) |
| Total acidity (ASTM D-664) | <0.2 mg KOH/g |
| Average molecular weight | 252 |
| Pseudocritical temperature | 569°C (1056°F) |
| Pseudocritical pressure | 24.3 bar (353 psia) |
| Pseudocritical density | 317 kg/m3 (19.8 lb/ft3) |
| Copper corrosion (ASTM D-130) | <<1a |
| Moisture content, maximum (ASTM E-203) | 150 ppm |
| Dielectric constant @ 23°C (ASTM D-924) | 2.61 |
RELATHERM VHT Very High Temperature Heat Transfer Fluid
Well proven synthetic thermal fluid chemically equivalent to Therminol® 66. It is a liquid phase heat transfer fluid designed for 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: 345ºC / 650°F
- Flash Point: 184ºC / 363°F
- Resistant to fouling and solids/coke formation
- Excellent thermal stability
- Top-off compatible with Therminol® 66. No flush required.
Technical Documents
Physical Properties
Additional Information
WHY RELATHERM VHT?
If thermal stability, reliability and precise temperature control are required of a heat transfer fluid at high operating temperatures, Relatherm VHT is the optimal choice. It provides dependable and trouble-free equipment operation. The thermal fluid is non-corrosive and maintains a low vapor pressure over its recommended operating temperature.
COMPREHENSIVE PRODUCT PORTFOLIO
If Relatherm VHT 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 VHT 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 VHT provides lower maintenance costs, longer uptime and less frequent fluid changeouts.
EXTENDED FLUID LIFE
Relatherm VHT 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.