Gasoline and diesel engine oil quality levels established jointly by API, SAE, and ASTM, and sometimes called SAE or API/SAE categories; formerly called API Engine Service Classifications.


Related Terms

PARTY WALL

A wall providing joint service between two buildings.

MAIN

1. One of the conductors extending from the service switch, generator bus, or converter bus to the main distribution center in interior wiring. 2. See power transmission line. 3. A duct or pipe that supplies or drains ancillary branches.

MACHINE ATTENTION TIME

Time during which a machine operator must observe the machine's functioning and be available for immediate servicing, while not actually operating or servicing the machine. Also known as service time.

DISPOSABLE

An element intended to be discarded and replaced after one service cycle.

ANTI-WEAR ADDITIVE

Improves the service life of tribological elements operating in the boundary lubrication regime. Anti-wear compounds (for example, ZDDP and TCP) start decomposing at 90° to 100°C and even at a lower temperature if water (25 to 50 ppm) is present.

FLUID COMPATIBILITY

The suitability of filtration medium and seal materials for service with the fluid involved.

HARMFUL INTERFERENCE

Any emission, radiation or induction which endangers the functioning of a radionavigation service or of other safety services or seriously degrades, obstructs or repeatedly inter- rupts a radio-communication service operating in accordance with the International Telecommunications Union Regulations.

SERVICE VALVE

Manually operated valve mounted on refrigerating systems used for service operation.

CONDENSING UNIT SERVICE VALVES

Shutoff valves mounted on condensing unit to enable service technicians to install and/or service unit.

RESIDUAL DIRT CAPACITY

The dirt capacity remaining in a service loaded filter element after use, but before cleaning, measured under the same conditions as the dirt capacity of a new filter element.

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