Petro-Canada CALFLO HTF – High-Temperature Heat Transfer Oil for Demanding Processes

CALFLO HTF is a high-performance heat transfer fluid designed for closed, liquid-phase systems operating up to 326 °C.
Made from 99.9% pure base oils produced through Petro-Canada’s HT Purity Process, it combines exceptional thermal stability, oxidation resistance, and safety.
CALFLO HTF delivers long-lasting performance without the health, odor, or environmental risks associated with synthetic aromatic fluids.

Product Advantages
• Excellent oxidation stability – ideal for systems exposed to air contact
• Long service life – reduces sludge and deposit formation
• Low vapor pressure – minimizes leakage and enhances workplace safety
• High thermal efficiency – consistent heat transfer up to 326 °C
• Natural lubricity extends pump and seal life
• Non-toxic, practically odorless, and environmentally responsible
• Easy disposal through recycling or energy recovery

Typical Applications
• Closed liquid-phase systems up to 326 °C supply temperature
• Plastics processing (extrusion, injection molding, calendering)
• Chemical and petrochemical process heating
• Metal die-casting and mold heating
• Industrial process heat systems

Specifications/Approvals

Designed for closed, non-pressurized systems up to 326 °C
Complies with OSHA (USA), WHMIS (Canada), DPD (Europe) – non-toxic classification
ISO 9001:2015 / ISO 14001:2015 certified

Typical Properties
Color: <0.5 (ASTM D1500)
Density at 15 °C: 0.869 kg/l (ASTM D4052)
Viscosity at 40 °C: 35.9 mm²/s (ASTM D445)
Viscosity at 100 °C: 6.0 mm²/s (ASTM D445)
Flash Point (COC): 231 °C (ASTM D92)
Fire Point: 245 °C (ASTM D92)
Pour Point: –18 °C (ASTM D5950)
Autoignition Temperature: 352 °C (ASTM E659)
Neutralization Number: <0.1 mg KOH/g (ASTM D664)
Sulfur Content: <0.0001 wt.% (ASTM D4294)
Conradson Carbon Residue: 0.03 wt.% (ASTM D189)
Thermal Expansion Coefficient: 0.0932 %/°C
Distillation Range: 10 % – 374 °C / 90 % – 476 °C

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Datasheets