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Copy of Innovative Heating Solutions for a sustainable future

Maxothermie®660

Maxothermie®-660 is a high-performance synthetic heat transfer fluid engineered for non-pressurized and low-pressure indirect heating systems operating at very high temperatures. It is designed for reliable operation in closed-loop heating systems across a wide liquid-phase temperature range of –7°C to 350°C, with exceptional thermal stability and ultra-low vapor pressure.

Operating Temperature

Minimum Startup Temp (300 cSt) Maximum Operating Temp (Bulk)
20°F / –7°C 662°F / 350°C

Key Features & Benefits

  • Wide operating temperature range: –7°C to 350°C (bulk), up to 375–380°C film temperature

  • Exceptional thermal stability minimizes degradation at extreme temperatures

  • Ultra-low vapor pressure enables safe non-pressurized or low-pressure system operation

  • High resistance to oxidation extends fluid and equipment service life

  • High boiling point reduces volatility and leakage risk

  • High auto-ignition temperature (>450°C) enhances safety in high-temperature zones

  • Low pour point (–25°C) supports cold start-up and ease of handling

  • Low acidity (≤0.01 mg KOH/g) helps maintain system cleanliness

  • Excellent heat transfer efficiency improves process control and energy utilization

  • Long service life reduces downtime and replacement costs

  • Clean operation with minimal sludge, fouling, or carbon formation

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Typical Applications

  • Chemical and petrochemical processing

  • Polymer, plastic, and resin manufacturing

  • Pharmaceutical reactors, dryers, and synthesis units

  • Food and specialty chemical processing

  • Heat transfer systems in reactors and distillation units

  • Industrial ovens, dryers, and calenders

  • Continuous high-temperature processing lines

  • Asphalt, bitumen, and specialty material heating

  • Heavy-duty thermal oil heaters and heat exchangers

Technical Advantages 

  • Engineered specifically for non-pressurized / low-pressure heating systems

  • Suitable for continuous, high-temperature industrial operation

  • Maintains stable viscosity and heat transfer characteristics over extended periods

  • Low vapor pressure ensures safe liquid-phase heat transfer

  • Reduced oxidation and acidity improve system reliability and cleanliness

  • Compatible with standard thermal fluid system materials and components

  • Minimizes fouling, carbon buildup, and maintenance frequency

  • Proven performance across diverse industrial operating conditions