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Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Eastman Therminol 66 Therminol 66 Heat Transfer Fluid

Eastman Therminol 66 is a premium synthetic aromatic hydrocarbon heat transfer fluid in the Therminol series, engineered for stable long-term operation up to 345°C. It offers low vapor pressure, excellent thermal stability, and minimal degradation—ideal for closed-loop industrial heating systems in chemical, pharmaceutical, and food processing applications.
  • eastman therminol 66 therminol 66 heat transfer fluid_e9166970
  • eastman therminol 66 therminol 66 heat transfer fluid_e9166970

Features Of Eastman Therminol 66 Therminol 66 Heat Transfer Fluid

  1. Thermally stable aromatic hydrocarbon blend engineered for long-term operation up to 345 °C (650 °F) in liquid-phase systems.

  2. Low vapor pressure at elevated temperatures, minimizing pump cavitation and system pressurization requirements.

  3. Excellent oxidative stability with inhibited degradation, extending fluid service life under proper system maintenance.

  4. Non-corrosive to common carbon steel, stainless steel, and copper alloys when used within recommended operating limits.

  5. Compatible with standard nitrile, EPDM, and fluorocarbon elastomer seals commonly found in industrial heat transfer systems.

Typical Applications Of Eastman Therminol 66 Therminol 66 Heat Transfer Fluid

  1. Chemical processing reactors and distillation reboilers requiring precise temperature control in the 200–345 °C range.

  2. Pharmaceutical manufacturing equipment, including jacketed vessels and sterilization systems.

  3. Food-grade industrial ovens and baking tunnels where indirect heating is mandated and thermal consistency is critical.

  4. Plastics processing machinery such as extruder barrels and mold temperature controllers.

  5. Solar thermal energy collection systems utilizing parabolic troughs and organic Rankine cycle (ORC) heat exchange loops.

Specifications Of Eastman Therminol 66 Therminol 66 Heat Transfer Fluid

Chemical TypeAromatic hydrocarbon blend (inhibited)
Product FormLiquid (bulk or drummed)
AppearanceClear, light amber liquid
Primary ApplicationsLiquid-phase heat transfer in closed-loop industrial systems
Maximum Continuous Use Temperature (Liquid Phase)345 °C (650 °F)
Minimum Pour Point−34 °C (−30 °F)
Key FeaturesHigh thermal stability, low volatility, oxidation resistance
BenefitsExtended fluid life, reduced system maintenance, operational safety at high temperatures


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