Mobiltherm™ 600 Series heat transfer oils
Mobiltherm™ 600 Series heat transfer oils are high-performance lubricants for use in closed and open, cold-oil sealed, indirect heating and cooling systems.
Mobiltherm 600 Series heat transfer oils may help:
- High heat transfer rates and thereby potentially improved operating efficiency
- Increase service life without deposit formation or viscosity increase
- Easy starting of cold systems
- Keep equipment free from sludge and coke deposits, helping result in lower maintenance
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Features and Benefits
Mobiltherm oils are important members of the Mobil brand of specialty fluids that have gained a reputation for performance and reliability, even in severe applications. Modern refining techniques are a key factor in providing the excellent product features.
Mobiltherm 600 Series offer the following benefits:
|Features||Advantages and Potential Benefits|
|High resistance to thermal cracking and decomposition||Free from sludge and coke deposits and minimum interference with heat transfer capability and minimized maintenance needs|
|Excellent thermal properties||High heat transfer rates and improved operating efficiency and lower operating costs|
|Good thermal and oxidative stability||Long trouble free service life and reduced downtime|
|Good low temperature fluidity||Easy starting of cold systems|
Application Considerations: Mobiltherm heat transfer oils should not be mixed with other oils since this may impair the excellent thermal and oxidation stability resulting in a change in other properties, and complicate analyses aimed at determining useful oil life. If the oils are used above their recommended maximum temperatures, vapor lock may result unless the system is designed to operate at the higher temperature by pressurizing with an inert gas such as nitrogen. At higher temperatures, fluid life will be shortened because the rate of thermal degradation which increases markedly as temperatures rise above the recommended limit. In well-designed systems the temperature of the oil film surrounding the heating element should be about 15ºC to 30ºC above the bulk oil temperature. If higher than this, the service life of the oil may be shortened and sludge and coke may be deposited which would interfere with the heat transfer rates.
As with other mineral oils, Mobiltherm heat transfer oils should be used only in systems with forced circulation. Systems that depend on convection for circulation of the heat transfer medium do not provide a rapid enough flow to prevent local overheating and rapid deterioration of the oil. Further, these oils are not recommended for use in open systems where hot oil is exposed directly to the air. If they spray or escape from leakage points, hot Mobiltherm oils may spontaneously ignite.
Mobiltherm 600 series can be used in open and closed installations where the bulk oil temperature ranges are as outlined in the table below.
- Mobiltherm 603: Closed Systems (-15º C to 285º C), Open Systems (-15º C7 C to 150º C)
- Mobiltherm 605: Closed Systems (-12º C to 315º C), Open Systems (-12º C to 180º C)
- Mobiltherm 610: Open systems (-6°C to 250°C)
- Mobiltherm 611: Open systems (-6°C to 275°C)
|Mobiltherm 600 Series||603||605||610||611|
|Viscosity, ASTM D 445||
|cSt @ 40ºC||20.2||30.4||113||490|
|cSt @ 100ºC||4.2||5.4||11.5||31.5|
|Pour Point, ºC, ASTM D 97||-15||-12||-6||-6|
|Flash Point, ºC, ASTM D 92||194||230||250||294|
|Specific Gravity @15 ºC kg/l, ASTM D 4052||0.835||0.857||0.88||0.906|