Looking for a reliable replacement for Therminol 66 and Dowtherm RP?
Armcoltherm 680 Synthetic Heat Transfer Fluid offers greater thermal stability than competitive aromatic-based fluids that cover similar temperature ranges. Testing (ASTM D6743) shows that, compared to its closest competitor, Armcoltherm 680 Heat Transfer Fluid experiences 1/2 the amount of fluid degradation when maintained at 700°F for 500 hours. Less degradation means less maintenance and a longer fluid life.
Max. Bulk Temp
Max. Film Temp
Pour Point
Flash Point
Kinematic Viscosity @40℃
Certifications & Compliance
| Technical Properties | ARMCOLTHERM 680 | Therminol 66 | Dowtherm RP |
|---|---|---|---|
| Chemical Type | Modified Terphenyl | Modified Terphenyl | Diaryl Alkyl |
| Max. Bulk Temperature | 350°C | 345°C | 350°C |
| Max. Film Temperature | 380°C | 375°C | 375°C |
| Thermal Stability | Excellent (Ultra-low fouling) | Industry Standard | Industry Standard |
| Key Applications | Chemical, Resin, Polyester, Biodiesel | Chemical, Nylon, Synthetic Fibers | Chemical, Petrochemical, Plastics |
| Drop-in Replacement | Yes (1:1 Miscible) | Benchmark | Alternative Compatible |
Contact us to find the right thermal oil for your needs.
