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    Air usage per orifice size

    A nifty little guide to determine cfm flow based on orifice size at a given pressure.

    Orifice size (inch)
    1/64 1/32 1/16 1/8 1/4 3/8 1/2 5/8 3/4
    psi cfm flow per orifice size
    5 0.062 0.248 0.993 3.97 15.9 35.7 63.5 99.3 143
    15 0.105 0.42 1.68 6.72 26.9 60.5 108 168 242
    30 0.158 0.633 2.53 10.1 40.5 91.1 162 253 365
    40 0.194 0.774 3.1 12.4 49.6 112 198 310 446
    50 0.229 0.916 3.66 14.7 58.6 132 235 366 528
    70 0.3 1.2 4.79 19.2 76.7 173 307 479 690
    90 0.37 1.48 5.92 23.7 94.8 213 379 592 853
    100 0.406 1.62 6.49 26 104 234 415 649 934
    120 0.476 1.91 7.62 30.5 122 274 488 762 1097
    150 0.582 2.37 9.45 37.5 150 338 600 910 1315