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Maxothermie®HFF

Flushing  Fluid

MAXOTHERMIE®-HFF is a long-life, additive-free hot flushing fluid engineered for effective cleaning and preventative maintenance of liquid phase heat transfer systems. It is formulated with a high aromatic solvent base that dissolves sludge, carbon deposits, and degradation by-products without interrupting production.

Unlike conventional flushing oils, MAXOTHERMIE-HFF can operate as a temporary heat transfer fluid, allowing systems to continue running while internal cleaning takes place. It is suitable for long-term circulation in moderate temperature systems and supports a complete oil cycle when required.

Product Grade System Condition % Addition to System Production During Run Flushing Required Max Use Temp
Maxothermie-HFF-Gr1 Moderately to mostly fouled systems 50% – 100% Yes Yes 288°C
Maxothermie-HFF-Gr2 Severely fouled / emergency cleaning 100% Yes (lower temp) Yes 175°C

Key Features & Benefits

  • Designed specifically for hot flushing and system cleaning

  • High aromatic content effectively dissolves sludge and carbon build-up

  • Enables preventative maintenance without system shutdown

  • Can function as a temporary heat transfer fluid during cleaning

  • Suitable for long-term circulation in moderate temperature systems

  • Helps restore system efficiency and improve heat transfer

  • Reduces downtime, fouling, and premature fluid degradation

  • Compatible with most liquid phase thermal oil systems

Download Catalogue

Typical Applications

    • Preventative maintenance of thermal oil systems

    • Cleaning of moderately to severely fouled systems

    • Emergency system flushing and recovery

    • Process piping and heat exchanger cleaning

  • Systems with sludge, carbon, or degradation residue buildup

General System Cleaning & Start-Up Overview 

  • Drain existing heat transfer fluid completely, including low points

  • Air-blow system to remove residual fluid (“heel”)

  • Charge system with MAXOTHERMIE®-HFF

  • Circulate at recommended temperature for approximately 24 hours

  • Drain flushing fluid and air-blow again

  • Recharge system with fresh MAXOTHERMIE® heat transfer fluid

  • Follow standard controlled temperature ramp-up procedures

  • ation—keeps heaters & exchangers efficient