GLOSSARY OF TERMS
Adsorb
A method causing a liquid or gas to condense on the surface only of an adsorbing material
Air dryer
A device for drying compressed air by means of condensation obtained by over-compression or
cooling, absorption, adsorption or a combination of the above methods
Airflow
The motion of air relative to a body in it
Ancillary equipment
Components subordinate to the compressor
Atmospheric dew point
Temperature at which water vapor begins to condense at atmospheric pressure and the same as
dew point, but is related to atmospheric air only
Bag house
A dust-collection chamber containing numerous permeable fabric filters through which the
exhaust gases pass. Finer particulates entrained in the exhaust gas stream collect in the filters for
subsequent treatment/disposal
Bar
A unit of pressure equal to 0 99 atmospheres or 14 233 psi
Breathing air
Specialty compressed air treatment meeting OSHA Grade D breathing air requirements
Bubble
In spray painting applications, air trapped in a paint film caused by poor atomization during
spraying
Capacity
Capacity of a compressor is the full rated volume of flow of gas compressed and delivered at
certain set conditions
CFM
ACRONYM - Cubic feet per minute. An air flow measurement of volume
Compressed air
Air under pressure greater than that of the atmosphere
Compressor
A machine that compresses air, gases
Condensate
Liquid that separates from a vapor during condensation
Contaminate
Foreign matter carried in the air, gas or fluid to be filtered out. Includes air borne dirt, metallic
particles produced by wear of moving parts of the air compressor, rust from metal pipelines
Control valve
A valve that controls the flow in air lines
Cut in - cut out pressure
Minimum pressure or the pressure that the system reduces to before air volume is required
Cycle
A single complete operation consisting of progressive phases starting and ending at the neutral
position
Cycle time
Amount of time for a compressor to complete one cycle
Cylinder
The piston chamber in a compressor or actuator
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