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  • Home
  • Products
    • Food and Pharma
    • Industrial Chemicals
    • Heat Transfer Fluids
    • Home and Personal Care
    • Polyurethanes
    • Plasticizers
    • Refrigerants
    • Swimming Pools
    • Water Solutions
    • List of Products
  • About Us
  • Careers
  • Contact Us

Heat Transfer Fluid Product Line

6/7/2016

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DOWTHERM™  A heat transfer fluid is a eutectic mixture of two very stable compounds, biphenyl (C12H10) and diphenyl oxide (C12H10O). These compounds have practically the same vapor pressures, so the mixture can be handled as if it were a single compound. DOWTHERM A fluid may be used in systems employing either liquid phase or vapor phase heating.

DOWTHERM™  RP heat transfer fluid is a diaryl alkyl intended for use in applications that require liquid phase heat transfer. DOWTHERM RP fluid can be used in non-pressurized systems and is pumpable to 0 °C.

DOWTHERM™  SR-1 heat transfer fluid is a formulation of 95.5 weight percent ethylene glycol and a specially designed package of industrial corrosion inhibitors. The fluid is dyed fluorescent pink for leak detection purposes. Solutions in water provide freeze protection to below -50 °C and burst protection to -73 °C.


DOWFROST™  HD heat transfer fluid is a formulation of 94.0 percent propylene glycol and a specially designed package of industrial corrosion inhibitors. The fluid is dyed bright yellow to aid in leak detection. Solutions in water provide freeze protection to below -50°C and burst protection to below -73°C. 
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Glycol Heat Transfer Fluid

6/7/2016

1 Comment

 
  • Choice of Dowtherm SR-1 for Industrial Grade and Dowfrost for Food Grade
  • Corrosive
    • ​All salts are very corrosive
    • Long term protection is impossible even with corrosion inhibitors
    • Glycols (without corrosion inhibitors) are corrosive to most metals
    • Oxidize to form acids --> low pH --> acidic pH is corrosive
    • Must use correct type of corrosion inhibitor technology
    • Corrosion damage can occur in less than 2 years
    • Worse for high temperatures and high exposure to air or dissolved O2
  • Dow heat transfer fluids are properly formulated with corrosion inhibitors and pH buffers which:
    • Passivate metal surfaces  prevent corrosion
    • Neutralize degradation compounds  prevent pH drop
    • Thermoxidatively stable provide long term protection
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Free Fluid Analysis for Dowfrost / Dowtherm customers

6/6/2016

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For customers using more than 2000 Liters of inhibited glycol, Dow offers free annual fluid analysis consisting of the tests below. Dow will also recommend how to improve the system if needed.
  • ​Glycol concentration
  • ​Reserve Alkalinity and pH
  • Corrosive water ions: chloride and sulfate
  • Corrosion inhibitors & corresponding corrosion rates
  • Total hardness: calcium and magnesium
  • Non-Dow inhibitors: e.g. MBT, nitrate & nitrite
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