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Air pressure required for plastics blow molding.



Related Terms

BLOWING PRESSURE

Pressure of the air or other gases used to inflate the parison in blow molding.

POSITIVE PRESSURE RESPIRATOR

A respirator in which the pressure inside the respiratory inlet covering exceeds the ambient air pressure outside the respirator.

MULTISTAGE COMPRESSOR

In multistage compressors the required air pressure is created by compressing the air in two or more unequal cylinders.

BURNER WINDBOX

A plenum chamber around a burner in which an air pressure is maintained to ensure proper distribution and discharge of secondary air.

PUMPING

Unsteadiness of the mercury in a barometer, caused by fluctuations of the air pressure produced by a gusty wind or due to the motion of a vessel.

AIR BRAKE

An energy-conversion mechanism activated by air pressure and used to retard, stop, or hold a vehicle or, generally, any moving element.

FURNACE DRAFT

The negative air pressure generated by buoyancy of hot gases inside a furnace. The temperature difference between gases within the furnace and in the atmosphere along with furnace and stack height basically determine the amount of draft generated by the furnace. Draft is generally measured in negative inches of water column. ('-w.c.'; 27.7 inches w.c. = 1 psig)

CLOSED FIREROOM SYSTEM

A fireroom system in which combustion air is supplied via forced draft resulting from positive air pressure in the fireroom.

DECOMPRESSION CHAMBER

  1. A steel chamber fitted with auxiliary equipment to raise its air pressure to a value two to six times atmospheric pressure; used to relieve a diver who has decompressed too quickly in ascending. 2. Such a chamber in which conditions of high atmospheric pressure can be simulated for experimental purposes.

S.O.I.

The Southern Oscillation Index is calculated from seasonal air pressure fluctuation differences between Tahiti and Darwin.

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