اکسانموبیل، (به انگلیسی: ExxonMobil) شرکت نفت و گاز آمریکایی و دومین شرکت نفتی بزرگ جهان است، که دفتر مرکزی آن، در شمال شهر ایروینگ، تگزاس قرار دارد.کمپانی اکسانموبیل، هماکنون بهعنوان سومین شرکت بزرگ جهان بر پایه میزان درآمد سالانه، شناخته میشود. در سال ۲۰۱۲ این شرکت، در فهرست فوربز جهانی ۲۰۰۰، در رتبه اول از بزرگترین کمپانیهای جهان قرار گرفت. در سال ۲۰۰۷ ذخایر نفتی اکسانموبیل؛ معادل ۷۲ میلیارد بشکه، برآورد شد.با توجه به تعداد ۳۷ پالایشگاه نفت این شرکت، که در ۲۱ کشور مستقر میباشند، اکسانموبیل با ظرفیت پالایش روزانه ۶٫۳ میلیون بشکه نفت، بزرگترین پالایشگر جهان، محسوب میشود.در فهرست شش کمپانی برتر نفتی جهان، که بنام «سوپرمیجر» طبقهبندی میشوند، اکسانموبیل، رتبه نخست را، به خود اختصاص داده است. محصولات تولید شده توسط شرکت اکسانموبیل، با سه برند «موبیل»، «اکسان» و «اسو» عرضه میشوند. بنیانگذار این شرکت نفتی، جان دیویس راکفلر بود.
Polyalkylene Glycol (PAG) Gear, Bearing and Compressor lubricant
Mobil Glygoyle Series lubricants are high performance gear, bearing and compressor oils designed to provide outstanding benefits in terms of efficiency, long oil life, and equipment protection. These fully synthetic, Polyalkylene Glycol (PAG) lubricants were developed for use under operating conditions beyond the capabilities of other synthetic lubricants and mineral oils. Their low pour points provide excellent low-temperature fluidity. The ISO 150 to 1000 grades are approved for USDA/NSF H-1 foodgrade use. The unique formulation is designed to provide:
Features and Benefits
The Mobil Glygoyle Series of fully synthetic oils is specifically designed to outperform mineral and PAO synthetic lubricants in gear and hydrocarbon gas compression applications. In worm gears, the unique properties of these oils allows for more torque to be put through the reducer, while in many cases lowering the operating oil sump temperature. Reduced temperatures can result in longer seal, oil and gearbox life. In gas compressors, the limited solubility of hydrocarbons in the Mobil Glygoyle Series allows for reduced lubricant dilution and enhanced equipment protection.
Features compared to other mineral, synthetic, and PAG lubricants:
General: There are various types of PAG base oils. The inherent properties of these oils can differ depending on the raw materials and processes used in their manufacture. Some of the features that can differ among various PAG oils include their traction coefficient (energy efficiency), thermal conductivity, solubility with hydrocarbon oils, tendency to attract water and low temperature properties.
High Efficiency: ExxonMobil researchers have selected PAG base oils that provide high levels of energy efficiency relative to mineral, PAO’s, and other PAG oils. This coupled with an increased thermal conductivity of about 10% over mineral and PAO oils can lead to lower operating temperatures and longer component life.
Wide Temperatures: The Mobil Glygoyle Series has very high VI ranging from 170 for the ISO 68 to 285 for the ISO 1000. High VI is indicative of a wide operating temperature range, typically beyond that of mineral and PAO lubricants.
Rust Protection: PAG lubricants which are designed to be immiscible with hydrocarbon oils, tend to absorb more water than mineral or PAO oils. Because of the potential for high water-in-oil levels, care must be taken to prevent the formation of rust on equipment. Mobil Glygoyle Series oils pass major rust tests such as ASTM D665A, Bethlehem Steel Rust Test Parts A/B, and receives 0,0 ratings in DIN 51802
EMCOR rust test with distilled water. In addition, they show good yellow metal compatibility with a 1B rating for ASTM D130. Mobil Glygoyle Series is not recommended for use in areas where saltwater contamination is expected.
Foam Control: Foam control is important, especially in gearboxes that are “Sealed for Life”. Mobil
Glygoyle Series provides excellent results in all three sequences of ASTM D892 Foam Test.
EP/antiwear: Having the right blend of EP/AW protection is important, especially in worm gears that contain bronze and other yellow metals. Glygoyle Series lubricants show excellent EP/antiwear protection with typical results of 12+ for DIN 51354-2 FZG scuffing test, very low cage and roller wear for DIN
۵۱۸۱۹-۳ FAG FE8 test, and excellent micropitting protection with a result of ›۱۰-high for the FVA 54 micropitting test (ISO 320).
The Mobil Glygoyle Series is specifically designed for the lubrication of worm gears, especially for heavy- duty, severe service applications, in applications where USDA/NSF H-1 approved lubricants are required and for many non food-grade applications. Additionally, the product family has also proven to be an excellent lubricant for many types of industrial gears and anti-friction bearing applications in severe service conditions. Additionally, their poor miscibility with hydrocarbons makes the lower viscosity grades especially effective in hydrocarbon gas compression applications, because of the reduced viscosity dilution that occurs in this application versus hydrocarbon based compressor oils.
The Mobil Glygoyle Series is used for the lubrication of filled for life gearboxes and heavy-duty worm gears, other industrial gearing in a wide variety of applications, lubrication of plain and rolling contact bearings, and most types of compressors.
Specific applications include:
Polyalkylene Glycol (PAG) based lubricants have some excellent inherent lubrication properties imparted by the PAG base oil. However, PAG based lubricants do have limitations with respect to compatibility with seal and coating materials, some varieties of light metal alloys and other lubricants. Before applying any PAG lubricant, contact the original equipment manufacturer for specific advice on the application.
Compatibility with other lubricants
The Mobil Glygoyle Series is not compatible with mineral oils and most other synthetic lubricants. Additionally, depending on the specific type of PAG base fluid, they may not be compatible with other
PAG type lubricants. Mobil Glygoyle 11, 22 and 30 and Mobil Glygoyle ISO VG Series are not miscible and therefore considered incompatible. Mobil Glygoyle Series is not generally recommended for use in
systems previously filled with mineral oils, or PAO based synthetic lubricants. It is further recommended
to check compatibility when topping up or replacing existing PAG filled equipment with Mobil Glygoyle Series. Generally the preference is to avoid mixtures by draining, thoroughly flushing out the existing lubricant (with the Glygoyle fluid chosen), cleaning out any residues where possible and refilling with the appropriate Mobil Glygoyle grade.
For further details please contact your Imperial Oil representative.
Mobil Glygoyle Series is hygroscopic and it will absorb more water than mineral oils or synthetic hydrocarbons. Therefore extra care should be taken not to expose PAG oils to excessive moisture. Due
to their inherent high specific gravity, water does not drop to the bottom of reservoirs, but stays on top of the lubricant.
PAG based lubricants are not compatible with most standard seal materials used for mineral oils or synthetic hydrocarbons. Incompatible materials are likely to shrink or swell, thus causing severe leakage
or seizure of the seal. When converting from mineral oil or synthetic hydrocarbons to Mobil Glygoyle
Series, seal compatibility must be considered. FKM and VMQ are generally suitable for use with PAG. NBR materials may be used but have restricted temperature ranges. In all cases, operating conditions and the variability of elastomer properties from different manufactures should be considered. For best results, consult the equipment supplier or seal manufacturer for specific recommendations.
Light Metal Alloys
Mobil Glygoyle Series PAG lubricants are well suited for gear applications with ferrous and most non ferrous materials. However, Mobil Glygoyle Series PAG lubricants are not recommended for use with light metal alloys containing Aluminum or Magnesium. The use of PAG lubricants can lead to increased wear
with light metal alloys of this nature. Please consult the original equipment manufacturer for additional
Paints, coatings and some plastics are not suitable for use with PAG lubricants. In general two component paints (reactive paints, epoxy resins) are suitable for use as interior coatings in contact with
PAG’s. Otherwise, interiors in contact with the lubricant should be left uncoated. Materials used for oil
level gages, inspection doors etc., should preferably be made of natural glass or polyamide materials. Other transparent plastics, (e.g. Plexiglas), may deteriorate and crack under stress.
Please note that not all grades are available in all regions. Check with your supply source for local availability.
The products described on this data sheet are manufactured from high quality petroleum base stocks, carefully blended with selected additives. As with all petroleum products, good personal hygiene and careful handling should always be practiced. Avoid prolonged contact to skin, splashing into the eyes, ingestion or vapour inhalation. Please refer to the Material Safety Data Sheet for further information.
Note: The products described on this data sheet are NOT controlled under Canadian WHMIS legislation.
GLYGOYLE is a trademark of ExxonMobil Oil Corporation or one of its subsidiaries. Imperial Oil, Licensee.
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