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Mobil Rarus™ 427MOBIL RARUS 427

Electric Motor Bearing Grease

5 Gallon Containers

  Product Description

 

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.

FeaturesAdvantages and Potential Benefits
Low Ash and Carbon FormationImproved valve performance
Reduced deposits in discharge lines
Reduced potential for fires and explosions in discharge systems
Improved compressor performance
Outstanding Oxidation and Thermal StabilityLonger oil life
Improved filter life
Lower maintenance costs
High Load-carrying abilityReduced wear of rings, cylinders, bearings and gears
Excellent Water SeparabilityLess 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 ProtectionImproved protection of valves and reduced wear of rings and cylinders

Applications

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
Mobil Rarus 400 Series427
ISO Viscosity Grade100
Viscosity, ASTM D 445 
cSt @ 40º C104.6
cSt @ 100º C11.6
Viscosity Index, ASTM D 2270100
Sulfated Ash, wt%, ASTM D 874‹0.01
Copper Strip Corrosion, ASTM D130, 3 h @ 100º C1B
FZG Load Support, DIN 51354, Fail Stage11
Rust Characteristics; ASTM D665 B; ASTM D665 APass
Foam Seq I, ASTM D 89230/0
Flash Point, ºC, ASTM D 92264
Density @ 15º C, ASTM D 12980.879

Health and Safety
Based on available toxicological information, this product is not expected to produce adverse effects on health when used and handled properly. Information on use and handling, as well as health and safety information, can be found in the Material Safety Data Sheet (MSDS) which can be obtained from your local distributor or via the Internet on http://www.exxonmobil.com/lubes.

Copyright © 2001-2014 Exxon Mobil Corporation. All rights reserved.

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