شرکت تامین روانکار ایرانیان

شرکت نفت شل، (به انگلیسی: Shell Oil Company) شرکت نفت و گاز آمریکایی و شعبه کمپانی رویال داچ شل در ایالات متحده آمریکا می‌باشد.این شرکت در زمینه استخراج نفت و گاز طبیعی، بازاریابی فرآورده‌های نفتی، همچنین تولید محصولات پتروشیمی فعالیت می‌کند.شرکت نفت شل، با در اختیار داشتن بیش از ۲۵٫۰۰۰ جایگاه پمپ بنزین در ایالات متحده، مالک بزرگترین شبکه عرضه سوخت در این کشور می‌باشد. شمار کارکنان این شرکت حدود ۲۲٬۰۰۰ نفر است و دفتر مرکزی آن در هیوستون، تگزاس قرار دارد.

Shell Tivela GL 00

Synthetic semifluid gear lubricant

Shell Tivela GL 00 is a synthetic, semi-fluid gear lubricant.  It was developed in co-operation with major gear manufacturers to meet the demand for high quality, long life gear lubricants.

Shell Tivela GL 00 consists of a synthetic base oil blended with a controlled quantity of highly stable lithium soap and special additives to give outstanding lubrication performance

Applications

            Small industrial gear units

             Worm gears

Product Advantages

     Small industrial gear boxes can be lubricated for life with this semi-fluid grease

     Reduced power consumption and lower bulk lubricant temperature

     Lower start up torques compared with a conventional grease

     Reduced lubricant leakage; top up not normally required

     For use at bulk lubricant temperatures up to 130°C

Worm Gears

The low steel/tin-bronze frictional characteristics of Shell Tivela GL 00 make it particularly suitable for worm gears having this combination of alloys.

Steel/Aluminium-bronze

Shell Tivela GL 00 is not recommended for the combination steel/aluminium-bronze, for which a grease based on a high viscosity mineral oil is preferred.

Load Carrying Capacity

The load carrying capacity of the base oil in Shell Tivela GL 00 is extremely good.  In steel-steel scuffing tests using the IAE gear rig, under standard conditions, the load carrying capacity is some 65% higher than an equiviscous mineral oil, without using EP additives.

Low Temperature Conditions

The operation of grease-filled gearboxes in low-ambient temperatures presents two major problems:

     high torque, induced by stiffening of the lubricant

     starvation, caused by grease channelling.

In overcoming these problems, Shell Tivela GL 00 is superior to typical high quality mineral oil based gearbox greases.

High Temperature Conditions

Lubricants exposed to high temperatures and air will inevitably oxidise resulting in the formation of lacquer and sludge and inefficient operation due to an excessive increase in viscosity.

Shell Tivela GL 00 has excellent oxidation stability. It produces no lacquer or sludge and does not increase in viscosity under normal operating conditions.  It consequently provides much better performance at high temperatures than conventional gear greases.

Shell Tivela GL 00 is suitable for lubrication, at continuing operating bulk lubricant temperatures, up to 130°C.

Paints

High quality red lead or epoxy resin paints are recommended for use in contact with Shell Tivela GL 00, as the synthetic polyglycol component will tend to attack certain conventional paints.

Flushing and Filling with Shell Tivela GL 00

Shell Tivela GL 00 is a synthetic polyglycol based lubricant and must not be mixed with mineral oils.  Care should be taken when changing over from oil or conventional grease.

Flushing with a thin mineral oil will ensure, as far as possible, freedom from solid contaminants and deterioration products resulting from previous use of gear oils or greases.  It is important to ensure that none of the flushing oil remains in the gearbox.

When refilling the gearbox with Shell Tivela GL 00 every precaution should be taken to ensure complete cleanliness.  For optimum performance from both gearbox and lubricant, only the amount recommended by the gearbox manufacturer should be used.

Seals

Shell Tivela GL 00 may be used satisfactorily with all normal seal materials.  Leather seals are not recommended as the natural fats tend to be removed, leaving the seals thin and brittle.

Typical Physical Characteristics and Technical Data

These characteristics are typical of current production.  Whilst future production will conform to Shell’s specification variations in these characteristics may occur.