Air Compressor Lubricants
The Mobil Rarus 400 Series is a line of premium performance ashless air compressor lubricants designed to meet the stringent requirements of the major compressor manufacturers. They are formulated with high quality mineral base-oils and a high performance additive system designed to provide exceptional equipment protection and reliability for compressors operating under mild to severe conditions. They provide excellent wear protection and the ability to reduce maintenance costs through minimising equipment problems and downstream deposits and carryover. Because of their high FZG Ratings, the Mobil Rarus 400 Series make outstanding lubricants for compressor systems employing gears and bearings making them an excellent selection for crankcases as well as cylinder lubricants.
Features and Benefits
The use of the Mobil Rarus 400 Series oils can result in cleaner compressors and lower deposits compared to conventional mineral oils, resulting in longer running periods between maintenance intervals. Their excellent oxidation and thermal stability safely allow extended life capability while controlling sludge and deposit formation. They possess outstanding anti-wear and corrosion protection, which enhances equipment life and performance.
|Features||Advantages and Potential Benefits|
|Low Ash and Carbon Formation||Improved valve performance
Reduced deposits in discharge lines
Reduced potential for fires and explosions in discharge systems
Improved compressor performance
|Outstanding Oxidation and Thermal Stability||Longer oil life
Improved filter life
Lower maintenance costs
|High Load-carrying ability||Reduced wear of rings, cylinders, bearings and gears|
|Excellent Water Separability||Less carryover to downstream equipment
Reduced sludge formation in crankcases and discharge lines
Reduced blockage of coalescers
Less potential for emulsion formation
|Effective Rust and Corrosion Protection||Improved protection of valves and reduced wear of rings and cylinders|
The Mobil Rarus 400 Series oils are recommended for single and multistage air compressors. They are particularly effective for continuous high temperature operation. The maximum compressed air temperature, according to DIN 51506, is 220 °C. They are suitable for reciprocating and rotary type machines with the lower viscosity grades mainly used in rotary compressors. Rarus 400 Series oils are recommended for units with a history of excess oil degradation, poor valve performance or deposit formation. They are compatible with all metals used in compressor construction and with mineral-oil compatible elastomers used in seals, O-rings and gaskets.
Mobil Rarus 400 Series oils are not intended or recommended for use in air compressors for breathing applications.
The following types of compressors have shown excellent performance with the Mobil Rarus 400 Series oils:
- Reciprocating air compressor crankcases and cylinders
- Rotary screw compressors
- Rotary vane compressors
- Axial and centrifugal compressors
- Compressor systems with critical gears and bearings
- Compressors used in stationary and mobile applications
Specifications and Approvals
|Mobil Rarus 400 Series meets or exceeds the requirements of:||424||425||426||427||429|
|DIN 51506 VD-L (1985-09)||X||X||X||X||X|
|Mobil Rarus 400 Series||424||425||426||427||429|
|ISO Viscosity Grade||32||46||68||100||150|
|Viscosity, ASTM D 445|
|cSt @ 40º C||32||46||68||104.6||147.3|
|cSt @ 100º C||5.4||6.9||8.9||11.6||14.7|
|Viscosity Index, ASTM D 2270||105||105||105||100||100|
|Sulfated Ash, wt%, ASTM D 874||‹0.01||‹0.01||‹0.01||‹0.01||‹0.01|
|Copper Strip Corrosion, ASTM D130, 3 h @ 100º C||1B||1B||1A||1B||1A|
|FZG Load Support, DIN 51354, Fail Stage||12||11||12||11||11|
|Rust Characteristics; ASTM D665 B; ASTM D665 A||Pass||Pass||Pass||Pass||Pass|
|Foam Seq I, ASTM D 892||10/0||20/0||0/0||30/0||430/20|
|Flash Point, ºC, ASTM D 92||236||238||251||264||269|
|Density @ 15º C, ASTM D 1298||0.866||0.873||0.877||0.879||0.866|
Health and Safety
Based on available information, this product is not expected to produce adverse effects on health when used for the intended application and the recommendations provided in the Material Safety Data Sheet (MSDS) are followed. MSDS’s are available upon request through your sales contract office, or via the Internet. This product should not be used for purposes other than its intended use. If disposing of used product, take care to protect the environment.
It cannot be guaranteed that the product information given above is up to date. For the latest version of the Product Data Sheet we refer to the product library of ExxonMobil.