20 items found. For further information on glossary terms contact us
In the oil industry a term normally used to denote an inorganic material added to an oil or grease, i.e., moly, graphite, zinc oxide.
The ability of a lubricant film to withstand the effects of speed, temperature and load without breaking down.
Any device or porous substance used for cleaning and removing suspended matter from a gas or fluid.
Lowest temperature at which a combustible fluid will burst into flame in the presence of an extraneous ignition source. Very little additional heat is required to reach the fire point from the flash point.
A fluid, difficult to ignite, that shows little tendency to propagate flame.
A lubricant used especially in high-temperature or hazardous hydraulic applications, such as steel mills and underground mining. Three common types of fire-resistant fluids are: (1) water-petroleum oil emulsions, in which the water prevents burning of the
Minimum temperature of a petroleum product or other combustible fluid at which vapour is produced at a rate sufficient to yield a combustible mixture. Specifically, it is the lowest sample temperature at which the air vapour mixture will "flash" in the pr
Liquid, gas or combination thereof.
Occurs between the molecules of a gas or liquid in motion, and is expressed as shear stress. Unlike solid friction, fluid friction varies with speed and area.
Energy transmitted and controlled through use of a pressurized fluid within an enclosed circuit.
An agglomeration of gas bubbles separated from each other by a thin liquid film. If an oil is said to not foam, the small air bubbles will quickly combine, become larger bubbles, and then break to vent to the atmosphere. If this action occurs slowly, the
An additive which causes foam to dissipate more rapidly. It promotes the combination of small bubbles into large bubbles which burst more easily.
A possible reaction of an oil when mixed with air. This entrained air can result in reduced film strength and a performance reduction.
Machine used to evaluate a lubricants antiwear qualities, frictional characteristics, or load carrying capabilities. There are four steel -inch balls. Three of the balls are clamped together in a cup filled with lubricant while the fourth ball is rotated
An internal combustion engine that requires two revolutions of the crankshaft to complete all four cycles.
A form of attritive wear resulting from small-amplitude oscillations or vibrations that cause the removal of very finely divided particles from rubbing surfaces (e.g., the vibrations imposed on the wheel bearing of an automobile when transported by rail c
The resistance to the motion of one surface over another. The amount of friction is dependent on the smoothness of the contacting surfaces, as well as the force with which they are pressed together. Friction between unlubricated solid bodies is independen
The amount of unburned fuel present in the lubricant. This test will indicate problems such as fuel line, injector, carburettor and pump leaks. Fuel dilution is accurate down to less than 0.5%.
Complete separation of mated surfaces. No metal-to-metal contact.
A system of filtration in which the total flow of a circulating fluid system passes through a filter prior to component delivery.