Thermaflo® 660
Thermaflo® 660 (Partially Hydrogenated Terphenyls) is a recycled, high-performance, synthetic heat transfer fluid for use in non-pressurized, indirectly heated, liquid-phase hot oil systems. It provides continuous, long-lasting, performance in hot oil systems with operating temperature range of -7°C to 345°C (45°F to 650°F). Although a recycled heat transfer fluid, it exhibits superior thermal stability compared to many of its competitors.
Thermaflo® 660 Properties
| Appearance | Colorless to pale Yellow |
| Composition | Partially Hydrogenated Terphenyl |
| Moisture Content (ppm) | <200 |
| Flash Point, COC | 374°F (190°C) |
| Autoignition Temperature (ASTM D-2155) | 716°F (380°C) |
| Kinematic Viscosity @ 40°C, Cs | 30 |
| Kinematic Viscosity @ 100°C, Cs | 3.9 |
| Density @ 20°C, lbs/gal | 8.32 |
| Specific Gravity @ 20°C | 1.012 |
| Freeze Point | <-27°F (<-33°C) |
| Pumpability Limit (KV=400cSt) | 41°F (5°C) |
| Boiling Range @ 760 mmHg | 637°F-662°F (336°C-350°C) |
| Bulk Temperature Range | 32°F-653°F (0°C-345°C) |
| Maximum Film Temperature | 689°F (370°C) |
| Total Acid Number, Max, mg KOH/g | <0.05 |
| Thermal Conductivity, BTU/ft/hr @ 600°F (316°C) | .0535 |
| Vapor Pressure (psi) @ 600°F (316°C) | 6 |
| Average Molecular Mass | 252 |
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