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Compressed Air Glossary of Terms :: U ::

Glossary Index
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UL
Underwriters Lab.

Ultrasonic leak detector
An instrument designed to detect the ultrasonic emissions and convert them to audible signal.

UNC
Thread - Unified national coarse.

UNF
Thread - Unified national fine.

Unit type compressors
Compressors of 20 HP or less, generally combined with all the components required to put the into operation.

Unload
The air compressor continues to run, usually at full RPM, but no air is delivered because the inlet is either closed off or modified, not allowing inlet air to be trapped.

Unloaded horsepower
The power that is consumed to overcome the frictional losses when operating in an unloaded condition.

Utilization factor
The ratio in percentage of the time that the equipment is in operation to the total working time.

Glossary Index
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Thanks to Impact RM for permission to reprint the glossary.

Impact RM

Compressed Air Glossary Impact RM


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