Armcoltherm 690 High temperature synthetic heat transfer oil -30℃~350℃ Armcoltherm 690 synthetic heat transfer oil has a maximum operating temperature of 350 ℃ appearance liquid, clear components dibenzyltoluene maximum operating temperature 350°C (660°F) maximum oil film temperature 380°C (715°F) normal boiling point 392°C (738°F) pumpability,300mm²/s (cSt) –1°C (30°F) pumpability,2000 mm²/s (cSt) –15°C (5°F) flash point, COC (ASTM D92) 219°C (426°F) spontaneous combustion point (ASTM E659) 459°C (858°F) spontaneous combustion point (DIN 51794) 500°C (932°F) pour point (DIN ISO 30…