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CFM vs PSI for Nozzles Gauge CFM Free Air Flow @ Nozzle Diameter (Inch) PSI 1/64 1/32 3/64 1/16 3/32 1/8 3/16 1/4 1 .03 .11 .2 .4 1.0 1.7 3.9 6.8 5 .06 .24 .5 1.0 2.2 3.9 8.7 15.4 10 .08 .34 .8 1.4 3.1 5.4 12.3 21.8 15 .10 .42 .9 1.6 3.7 6.6 15.0 26.7 20 .12 .48 1.1 1.9 4.2 7.7 17.1 30.8 25 .13 .54 1.2 2.2 4.7 8.6 19.4 34.5 30 .16 .63 1.4 2.5 5.6 10.0 22.5 40.0 40 .19 .77 1.7 3.1 6.8 12.3 27.5 49.1 50 .22 .91 2.0 3.6 8.2 14.5 32.8 58.2 60 .26 1.05 2.3 4.2 9.4 16.8 37.5 67.0 70 .29 1.19 2.7 4.8 10.7 19.0 43.0 76.0 80 .33 1.33 3.0 5.3 11.9 21.2 47.5 85.0 90 .36 1.47 3.3 5.9 13.1 23.5 52.5 94.0 100 .40 1.61 3.7 6.4 14.5 25.8 58.3 103.0 110 .43 1.76 3.9 7.0 15.7 28.0 63.0 112.0 120 .47 1.90 4.30 7.6 17.0 30.2 68.0 121.0 130 .50 2.04 4.6 8.1 18.2 32.4 73.0 130.0 140 .54 2.17 4.9 8.7 19.5 34.5 78.0 138.0 150 .57 2.33 5.2 9.2 20.7 36.7 83.0 147.0 175 .66 2.65 5.9 10.6 23.8 42.1 95.0 169.0 200 .76 3.07 6.9 12.2 27.5 48.7 110.0 195.0 PSI = pounds/square inch; CFM = cubic feet/minute Water Data and Formulas 1 gallon water = 231 cubic inches = 8.333 pounds Gallons per Minute Discharge for a Given Nominal Distance 1 pound of water = 27.7 cubic inches Pipe Diameter (inches) (inches) 5 6 8 10 12 1 cubic foot water = 7.5 gallons = 62.5 pounds (salt water 5 163 --- --- --- --- weighs approximately 64.3 pounds per cubic foot) 6 195 285 --- --- --- 7 228 334 580 --- --- Pounds per square inch at bottom of a column of water = height 8 260 380 665 1060 --- of column in feet x .434 9 293 430 750 1190 1660 10 326 476 830 1330 1850 1 miner's inch = 9 to 12 gallons per minute 11 360 525 915 1460 2020 12 390 570 1000 1600 2220 Horsepower to Raise Water 13 425 620 1080 1730 2400 If pumping liquid other than water, multiply the gallons per 14 456 670 1160 1860 2590 minute below by the liquids specific gravity 15 490 710 1250 2000 2780 16 520 760 1330 2120 2960 gallons per minute x total head in feet Horsepower = 17 550 810 1410 2260 3140 3960 18 590 860 1500 2390 3330 19 620 910 1580 2520 3500 Gallons Per Minute through a Pipe 20 650 950 1660 2660 3700 GPM = .0408 x pipe diameter inches2 x feet/minute water 21 685 1000 1750 2800 3890 velocity 22 720 1050 1830 2920 4060 23 750 1100 1910 3060 4250 Weight of Water in a Pipe 24 --- 1140 2000 3200 4440 Pounds water = pipe length feet x pipe diameter inches2 x .34 536 DPL108 pages518-554.pmd 536 10/5/2007, 10:29 AM
Goodyear Rubber Products
