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Compressed Air

Compressed Air
Cost of Air Leaks

How much do air leaks cost?

Diameter of air leak CFM of air lost at 100 psig x 60 = cu. ft. lost per hour x 24 = cu. ft. lost per day x 365 = cu. ft. lost per year Annual cost at $0.18 per 1,000 cu. ft. * Annual cost at $0.32 per 1,000 cu. ft. *
1/32" 1.62 97.2 2,332.8 851,472 $153 $272
1/16" 6.49 389.4 9,345.6 3,411,144 $614 $1,091
1/8" 26 1,560 37,440 13,665,600 $2,459 $4,372
1/4" 104 6,240 149,760 54,662,400 $9,839 $17,491
3/8" 234 14,040 336,960 122,990,400 $22,138 $39,356
1/2" 415 24,900 597,600 218,124,000 $39,262 $69,799
3/4" 934 56,040 1,344,960 490,910,400 $88,363 $157,091
1" 1,661 99,660 2,391,840 873,021,600 $157,143 $279,366

* According to Compressed Air Challenge of the U.S. Department of Energy's Office of Industrial Technologies, the total cost of 100 psig compressed air has been calculated to be in the general range of 18 to 32 cents per 1,000 cubic foot. (Source: Best Practices for Compressed Air Systems by Compressed Air Challenge. www.compressedairchallenge.org)

Did You Know?

A typical plant that has not been well maintained will have a leak rate equal to 10 - 30 percent of the total compressed air production capacity.

The easiest way to identify leaks in a compressed air system is to walk the plant and listen for them. (Especially during non-production times.)

To estimate a plant's leak load, operate the air compressor in a load/no-load (or start/stop) mode during a non-production time. Record the loaded vs. unloaded times, and compare these to the compressor's capacity.

One of the most common leak points in plants is at “abandoned” equipment. (Equipment that has air supplied to it while not operating.) Consider adding an automated shut off valve in the supply air line, which closes when the machine is turned off.

John Henry Foster Company has an ultrasonic leak detector available for rent. Labor services can also be provided to perform leak detection, including tagging and documenting all leaks. Please contact Jeff Gau at 314-593-1209 to request a quote.