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Sudden, unexpected failure of a machine resulting in considerable cost and downtime.

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CONTAMINANT FAILURE

Any loss of performance due to the presence of contamination. Two basic types of contamination failure are: Perceptible - gradual loss of efficiency or performance, and Catastrophic - dramatic, unexpected failure.

CONTAMINANT FAILURE

Any loss of performance due to the presence of contamination. Two basic types of contamination failure are: Perceptible - gradual loss of efficiency or performance, and Catastrophic - dramatic, unexpected failure.

DEPOSITS

Oil-insoluble materials that result from oxidation and decomposition of lube oil and contamination from external sources and engine blow-by. These can settle out on machine or engine parts. Examples are sludge, varnish, lacquer and carbon.

BURST PRESSURE RATING

The maximum specified inside-out differential pressure that can be applied to a filter element without outward structural or filter-medium failure.

EROSION

The progressive removal of a machine surface by cavitation or by particle impingement at high velocities.

FLOW FATIGUE RATING

The ability of a filter element to resist a structural failure of the filter medium due to flexing caused by cyclic differential pressure.

BREAKDOWN MAINTENANCE

Maintenance performed after a machine has failed to return it to an operating state.

FATIGUED

A structural failure of the filter medium due to flexing caused by cyclic differential pressure.

FERROGRAPHY

An analytical method of assessing machine health by quantifying and examining ferrous wear particles suspended in the lubricant or hydraulic fluid.

CAVITATION EROSION

A material-damaging process which occurs as a result of vaporous cavitation. 'Cavitation' refers to the occurrence or formation of gas- or vapor- filled pockets in flowing liquids due to the hydrodynamic generation of low pressure (below atmospheric pressure). This damage results from the hammering action when cavitation bubbles implode in the flow stream. Ultra- high pressures caused by the collapse of the vapor bubbles produce deformation, material failure and, finally, erosion of the surfaces.
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