Mobil Rarus 800 Series
Product Description
The Mobil Rarus? 800 Series is a line of supreme performance air compressor lubricants primarily intended for the lubrication of severe duty reciprocating air compressors but not recommended for air compressors used in breathing air applications. They are engineered to meet or exceed the stringent requirements of the major compressor manufacturers. They are formulated with design-specific synthetic base-oils and a high technology additive system that assures exceptional equipment protection and reliability for compressors operating under conditions where mineral-oil based products are not meeting expectations. Mobil Rarus 800 Series provides excellent wear protection and outstanding resistance to oxidation and thermal degradation, greatly superior to mineral oils. Their unique formulation provides the ability to help reduce maintenance costs through minimising equipment problems and downstream deposits and carryover.
Features and Benefits
The use of the Mobil Rarus 800 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
High Performance Synthetic Base Stocks
Significant performance capabilities relative to mineral oils
Improved safety
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
Applications
The Mobil Rarus 800 Series oils are recommended for single and multistage air compressors, but are not recommended for air compressors used in breathing air applications. They are particularly effective for continuous high temperature operation with discharge temperatures up to 200�C. They are suitable for reciprocating and rotary type machines with the lower viscosity grades mainly used in rotary compressors. Rarus 800 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-based lubricants but admixture will detract from their performance capabilities. Mobil Rarus 800 Series oils are compatible with seals made from fluorinated hydrocarbon, silicone, fluorosilicone, polysulfide, Viton, Teflon, and high nitrile Buna N NBR (above 36% acrylonitrile) materials. Materials not recommended include low nitrile Bune N NBR (below 30% acrylonitrile), natural and butyl rubbers, Neoprene, polyacrylate, styrene/butadiene and chlorosulfonated polyethylene.
Oil resistant paints are not affected by Mobil Rarus 800 Series, but lacquer, varnish, pvc and acrylic paints are not recommended.
The following types of compressor applications have shown excellent performance with the Mobil Rarus 800 Series oils:
? All types of air compressors but specifically recommended for reciprocating air compressor
? Units operating under severe conditions
? Multistage units with a history of excessive oil degradation from mineral oil-based products
? They can be used for cylinder and crankcase lubrication
? Compressor systems with critical gears and bearings
? Compressors used in stationary and mobile applications
Properties and Specifications
Property
824
827
829
Grade
ISO 32
ISO 100
ISO 150
Copper Strip Corrosion, 3 h, 121 C, Rating, ASTM D130
1B
1B
1B
Flash Point, Cleveland Open Cup, �C, ASTM D92
244
270
270
Foam, Sequence I, Stability, ml, ASTM D892
0
0
0
Foam, Sequence I, Tendency, ml, ASTM D892
10
10
10
Kinematic Viscosity @ 100 C, mm2/s, ASTM D445
5.5
10.12
13.2
Kinematic Viscosity @ 40 C, mm2/s, ASTM D445
29.5
107.5
158
Pour Point, �C, ASTM D5950
-54
-36
-33
Rust Characteristics, Procedure A, ASTM D665
PASS
PASS
PASS
Total Acid Number, mgKOH/g, ASTM D974
0.14
Total Acid Number, mgKOH/g, ASTM D974(mod)
0.06
0.15
Viscosity Index, ASTM D2270
127
66
70
