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Air which has been compressed above atmospheric pressure will return to atmospheric pressure when released. Therefore; compressed air is
STORED ENERGY! The amount of this stored energy, or the ability of the compressor to supply this energy is expressed in both CFM and PSIG. 
CFM or Cubic Feet Per Minute is the volume of air measuring the compressors capabilities.
Remember PSI = POUNDS PER SQUARE INCH or the measure of air pressure or force delivered by the compressor.
 
The Volume (MEASURED IN CFM) REQUIRED - DETERMINES THE SIZE OF AIR COMPRESSOR NEEDED TO DO THE JOB.
Example:
- 5 HP COMPRESSOR will supply 20 CFM at 100 PSIG
- 200 HP COMPRESSOR will supply 1,000 CFM at 100 PSIG
What does air volume do?
A One Horsepower Compressor could supply 200 PSIG or more.
Larger, more efficient, two stage reciprocating type compressors will provide 5 + cubic feet per horsepower.
Volume Does The Job Faster!
Some tools, motors, and hammers will not operate without sufficient volume.
What does air volume do?
Greater Pressure Increases The Force Or Torque!
Compressed air is the 4th utility to industry!
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TOOLS
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CFM REQUIRED AT 100 PSIG
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Drill 1/4"
Screwdriver #6
Nutsetter 1/2"
Impact Wrench 3/4"
Die Grinder
Horizontal Grinder
Vertical
Grinder 5" Pad
Burring Tool
Rammers- Medium
Air Motor 2-HP
Air Motor 2-HP
Air Hoist 1000 lbs.
Paint Spray Gun
Chipping Hammer
Circular Saw 8"
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25
24
30
35
24
60
35
24
34
25
50
One Cubic Foot Per Foot Of Lift
20
30
45
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It is as important as water, electricity, and fuel (gas, oil, etc.).
The great advantage of compressed air is the high ration of power to weight or power to volume. In comparing electric motors,
compressed air produces smooth translation with much more uniform force. Compressed air equipment can be more economical and more durable. Industrial
Uses of Compressed Air:
Production Line Tools - Automation & Assemble Stations - Plant Maintenance- Chemical Manufacturing - Aircraft Mfg. - Automobiles - Beverages -
Agriculture - Cement - Foundries - Plastics - Construction - Hospitals - Monuments - Power Plants - Sewage Plants - Painting & Ski areas.
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