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Castrol Perfecto™ HT Range (previously called Heat Transfer Oil Light 100 and Heat Transfer Oil 1590) are formulated from very stable paraffinic base oils that are fortified with high temperature oxidation inhibitors that carry away heat from critical components. Perfecto HT’s high viscosity index coupled with a low pour point offers excellent circulation during cold weather startups, eliminates heat from over heated pump motors, and protects against hot spots (high fluid temperature in the heat exchanger).
Unit of Measure

Package Type

 N/A Drum

ISO Viscosity Grade

N/A 22 cSt

Viscosity at 100 Degree Celsius (ºC) Temperature

 N/A 4.0 cSt

Viscosity Index

 N/A 97

Flash Point

 N/A 190 ºC

Pour Point

N/A -28 ºC

Bulk Density

 N/A 7.141 lb/gal

Specific Gravity at 60 Degree Fahrenheit (ºF) Temperature

 N/A 0.8576

Applications

 N/A Perfecto HT 4 (Heat Transfer Oil Light 100 Light) is recommended for application in closed circulation systems with temperatures up to 287° C (550° F). Perfecto HT 4 is particularly applicable where high transfer rates or good flow rates at fairly low temperature are desired.

Perfecto HT 5 Plus (Heat Transfer Oil 1590) is recommended for application in closed circulation systems with temperatures up to 315°C (600° F).

Features and Benefits

 N/A
  • Low vapor pressure at elevated temperatures and a high boiling point to prevent pressure build-up
  • Low carbon residue
  • Non-foaming and excellent demulsibility.
  • Long shelf life.