Mobil Rarus 427 is a performance ashless air compressor lubricants premium designed to meet the stringent requirements of the major compressor manufacturers. It was built with the kind of high-quality mineral base oils and high performance additive system designed to providespecial equipment protection and reliability for modern compressors operating under mild to severe conditions in marine applications and industries. It provides excellent wear protection and the ability to reduce maintenance costs by minimizing the deposits and carryover downstream. Because of its high FZG Ratings,
Mobil Rarus 427 is an outstanding lubricant for compressor systems using gears and bearings make it a great selection for crankcases as well as cylinder lubricants.
Mobil Rarus 427 exceeds the requirements of DIN 51506 VD-L and demonstrate a very high resistance to oxidation and deposit formation. It is recommended or approved by many manufacturers leading compressor.
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 |
| Mobil Rarus 400 Series | 427 |
| ISO Viscosity Grade | 100 |
| Viscosity, ASTM D 445 | |
| cSt @ 40º C | 104.6 |
| cSt @ 100º C | 11.6 |
| Viscosity Index, ASTM D 2270 | 100 |
| Sulfated Ash, wt%, ASTM D 874 | ‹0.01 |
| Copper Strip Corrosion, ASTM D130, 3 h @ 100º C | 1B |
| FZG Load Support, DIN 51354, Fail Stage | 11 |
| Rust Characteristics; ASTM D665 B; ASTM D665 A | Pass |
| Foam Seq I, ASTM D 892 | 30/0 |
| Flash Point, ºC, ASTM D 92 | 264 |
| Density @ 15º C, ASTM D 1298 | 0.879 |
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 cylindersRotary screw compressorsRotary vane compressorsAxial and centrifugal compressorsCompressor systems with critical gears and bearingsCompressors used in stationary and mobile applications
