Description
Castrol Perfecto HT 5 is based on a solvent refined, high viscosity index mineral oil specially selected for its high thermal and oxidation stability.
Application
Perfecto HT 5 is primarily intended for use in enclosed and sealed systems. It can also be used, at lower temperatures, in systems open to the air.
Perfecto HT 5 has a low viscosity which is essential when operating under turbulent flow conditions to achieve very high heat transfer rates.
Technical Data
| Name | Method | Units | Perfecto HT 5 |
| Relative Density at 15°C | ASTM D4052 | g/ml | 0.868 |
| Kinematic Viscosity at 40°C | ASTM D445 | cSt | 30.5 |
| Kinematic Viscosity at 100°C | ASTM D445 | cSt | 5.28 |
| Viscosity Index | ASTM D2270 | – | 106 |
| Pour Point | ASTM D97 | °C | -9 |
| Closed Flash Point | ASTM D93 | °C | 210 |
| Open Flash Point | ASTM D92 | °C | 220 |
| Fire Point | ASTM D92 | °C | 249 |
| Colour | IP 196 | – | 2.0 |
| Auto-ignition Temperature | ASTM D1255 | °C | 357 |
| Neutralisation Value | IP 1A | mgKOH/g | <0.05 |
| Specific Heat at 15°C | – | kJ/kg, °C | 186 |
| Maximum Film Temperature | – | °C | >340 |
| Thermal Conductivity at15°C | ASTM D1160 | W/m°C | 0.133 |
| Distillation Range Initial Boiling Point | – | °C | 343 |
| Distillation Range 10% distilled at | – | °C | 390 |
| Distillation Range 90% distilled at | – | °C | 454 |
| Thermal Expansion Co-efficient per °C at 15°C | – | – | 0.00077 |
The above figures are typical of those obtained with normal production tolerance and do not constitute a specification.