Mobil Rarus 827

Standards & approvals

Specifications

Brand

Mobil (ExxonMobil)

Range

Mobil Rarus

Category

Compressor oils

Viscosity

ISO VG 100

Manufacturer code

201560203010

Availability

On request

Typical characteristics

Manufacturer's description

Mobil Rarus 827 is the ISO VG 100 grade of the Mobil Rarus 800 Series, a line of supreme performance air compressor lubricants primarily intended for severe-duty reciprocating air compressors, though not recommended for breathing-air applications. Engineered to meet or exceed the requirements of major compressor manufacturers, it is formulated with design-specific synthetic base oils and a high-technology additive system that assures exceptional equipment protection where mineral-oil products fall short, providing excellent wear protection and oxidation and thermal stability far superior to mineral oils. The series significantly reduces the potential for fires and explosions compared to mineral oil-based products, thanks to a virtual absence of deposit formation and higher autogenous ignition temperatures, while exceptional water-separating characteristics reduce emulsion problems and carryover into downstream equipment. It is recommended for single- and multistage air compressors for continuous high-temperature operation with discharge temperatures up to 200°C, suitable for reciprocating and rotary machines, cylinder and crankcase lubrication, and compressor systems with critical gears and bearings, in stationary and mobile applications, and is compatible with common seal materials such as Viton, Teflon, and high-nitrile Buna N. Mobil Rarus 827 meets or exceeds China GB/T 12691-2021 L-DAB requirements, and the series is recommended or approved by many leading compressor manufacturers. Its kinematic viscosity is 107.5 mm²/s at 40°C and 10.12 mm²/s at 100°C, with a flash point of 270°C and a pour point of -36°C.

Applications

• Single- and multi-stage air compressors, but not for use in breathing-air applications; particularly effective for continuous high-temperature operation, with discharge temperatures up to 200°C.
• Reciprocating and rotary-type machines, with the lower viscosity grades mainly used in rotary compressors.
• Units with a history of excess oil degradation, poor valve performance or deposit formation.
• Compatible with all metals used in compressor construction and with mineral-oil-based lubricants, although admixture will detract from performance.
• Compatible with seals made from fluorinated hydrocarbon, silicone, fluorosilicone, polysulfide, Viton, PTFE and high-nitrile Buna N NBR (above 36% acrylonitrile). Not recommended: low-nitrile Buna N NBR (below 30% acrylonitrile), natural and butyl rubbers, neoprene, polyacrylate, styrene/butadiene and chlorosulfonated polyethylene. Oil-resistant paints are unaffected, but lacquer, varnish, PVC and acrylic paints are not recommended.
• All types of air compressors, but specifically recommended for reciprocating air compressors.
• Units operating under severe conditions.
• Multistage units with a history of excessive oil degradation from mineral-oil-based products.
• Cylinder and crankcase lubrication.
• Compressor systems with critical gears and bearings.
• Compressors used in stationary and mobile applications.

Performance & benefits

• Outstanding oxidation and thermal stability improve filter life and lower maintenance costs.
• High load-carrying ability and excellent water separability reduce wear of rings, cylinders, bearings and gears, reduce carryover to downstream equipment, reduce sludge formation in crankcases and discharge lines, reduce blockage of coalescers, and lower the potential for emulsion formation.
• Effective rust and corrosion protection improves protection of valves and reduces wear of rings and cylinders.

Fits

• Compressors & pumps