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A type of petroleum fluid derived from naphthenic crude oil, containing a high proportion of closed-ring methylene groups.

Related Terms

ROTARY COMPRESSOR

Mechanism which pumps fluid by using rotating motion.

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.

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.

EFFLUENT

The fluid leaving a component.

COOLANT

A fluid used to remove heat. See Cutting fluid.

ATF

Fluid for automatic, hydraulic transmissions in motor vehicles.

DEMULSIBILITY

The ability of a fluid that is insoluble in water to separate from water with which it may be mixed in the form of an emulsion.

HYDRAULIC FLUID

Fluid serving as the power transmission medium in a hydraulic system. The most commonly used fluids are petroleum oils, synthetic lubricants, oil-water emulsions, and water- glycol mixtures. The principal requirements of a premium hydraulic fluid are proper viscosity, high viscosity index, anti-wear protection (if needed), good oxidation stability, adequate pour point, good demulsibility, rust inhibition, resistance to foaming, and compatibility with seal materials. Anti-wear oils are frequently used in compact, high-pressure, and capacity pumps that require extra lubrication protection.

FILTRATION (BETA) RATIO

The ratio of the number of particles greater than a given size in the influent fluid to the number of particles greater than the same size in the effluent fluid.
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