Top 10 Compressed Air “Rules of Thumb”

Posted: October 9, 2009 in Air Compressors

Here are our TOP TEN Compressed Air “Rules of Thumb” that we’ve come up with throughout our 25-plus years of experience. These are the areas of interest that our air compressor customers seem to ask about most.

1. CFM delivery per Horse Power at 100 PSIG:
• For “home owner” type of air compressors—2 to 2.5 CFM per HP
• For Industrial Air-cooled 2-stage air compressors—-3.5 CFM per HP
• For Small Vane & Screw air compressors (25 HP or less) 4 CFM per HP
• For large Piston, Screw & Centrifugal air compressors–4.5 to 5 CFM per HP

NOTE: THE MORE CFM PER HP – THE LESS ENERGY USED.

2. Air Receiver Size needed for these types of inlet control:
• Modulating Control—————0 to 1 gallon per CFM
• On-Line/Off-Line—————–3 to 4 gallons per CFM
• Stop-Start/ Variable Speed——-4 to 6 gallons per CFM

NOTE: THE MORE AIR STORAGE  – THE LESS ENERGY USED

 3.  Amperage per Horse Power:
115 Volts——-  1 phase——– 10 amps per horse power
230 Volts——-  1 phase——– 5 amps per horse power
208 Volts——-  3 phase——– 3 amps per horse power
230 Volts——-  3 phase——– 2.5 amps per horse power
460 Volts——-  3 phase——– 1.25 amps per horse power
574 Volts——-  3 phase——– 1 amp per horse power

NOTE: THE MORE ENERGY EFFICIENT THE MOTOR – THE LESS ENERGY IS USED.

4. Air Piping Size by CFM and Pressure Drop:
• Compressor Room Header—0.25 PSIG pressure drop per 100 feet of piping
• Main Line—————–0.5 PSIG pressure drop per 100 feet of piping
• Loop Line—————–1 PSIG pressure drop per 100 feet of piping
• Branch Line—————2 PSIG pressure drop per 100 feet of piping

NOTE: THE LESS AIR PRESSURE DROP – THE LESS ENERGY USED.

5. Size Compressed Air Line Filters to be twice (2x) your compressor CFM flow rate.
• This will lower your pressure drop 2-3 PSIG and save an additional 1% on electrical energy costs.
• Elements will last twice (2x) as long and this can save on your maintenance costs.

6. Lowering Compressor Pressure settings 2 PSIG will result in a 1% energy savings.

 7. Lowering Compressor Inlet Air Temperature 10° F will result in a 2% energy savings.

 8. The average energy cost to operate an air compressor is approximately $0.10 per horse power per hour.

 9. Compressed Air system leaks totaling the size of a 1/4″ orifice, at 100 PSIG, running 24 hours a day will waste approximately $15,000 worth of electrical energy a year.

 10. Using Synthetic Compressor Lubricants can save you up to 9% of the energy cost of operating your compressor as compared to using a non-synthetic lubricant.

“Real People with Real Air Compressor Experience”

Tommy McGuire
Owner of McGuire Air Compressors
1-888-229-9999
Email:   compressors@mcguire.biz

Offering you Quality Industrial Equipment at a Savings…

http://www.industrialaircompressors.biz  – For Champion Industrial Air Compressors, pumps, oil & manuals

http://www.airdryers.biz – For Deltech Refrigerated Compressed Air Dryers to remove harmful moisture from your compressed air system

http://www.hosereels.biz – For Reelcraft Industrial Hose Reels for efficiency and safety

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