Additive that increase the viscosity of the fluid throughout its useful temperature range. Such additives are polymers that possess thickening power as a result of their high molecular weight and are necessary for formulation of multi-grade engine oils.

Related Terms

ROTARY COMPRESSOR

Mechanism which pumps fluid by using rotating motion.

AIR COOLER

A factory-encased assembly of elements whereby the temperature of air passing through the device is reduced.

DIELECTRIC STRENGTH

A measure of the ability of an insulating material to withstand electric stress (voltage) without failure. Fluids with high dielectric strength (usually expressed in volts or kilovolts) are good electrical insulators. (ASTM Designation D 877.)

CLEAN ROOM

A facility or enclosure in which air content and other conditions (such as temperature, humidity, and pressure) are controlled and maintained at a specific level by special facilities and operating processes and by trained personnel.

CUTTING FLUID

Any fluid applied to a cutting tool to assist in the cutting operation by cooling, lubricating or other means.

FILTER MANIFOLD

A filter assembly containing multiple ports and integral relating components which services more than one fluid circuit.

ABSOLUTE ZERO TEMPERATURE

Temperature measured from absolute zero (-459.67°F, or -273.16°C).

AIR REHEATING

In an air conditioning system, the final step in treatment, in the event the temperature is too low.

ANALYTICAL FERROGRAPHY

The magnetic precipitation and subsequent analysis of wear debris from a fluid sample .This approach involves passing a volume of fluid over a chemically treated microscope slide which is supported over a magnetic field. Permanent magnets are arranged in such a way as to create a varying field strength over the length of the substrate. This varying strength causes wear debris to precipitate in a distribution with respect to size and mass over the Ferrogram. Once rinsed and fixed to the substrate, this debris deposit serves as an excellent media for optical analysis of the composite wear particulates.

CLOUD POINT

The temperature at which waxy crystals in an oil or fuel form a cloudy appearance.

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