ENGINEERING MANUAL OF AUTOMATIC CONTROL
GENERAL ENGINEERING DATA
478
VELOCITY PRESSURE
Velocity pressure is total pressure minus static pressure. See Building Airflow System Control Applications section.
Table 22. Velocities for Different Velocity Pressures at Standard Air Conditions (20°C, 101.325 kPa).
VP V VP V VP V VP V VP V VP V
2.50 2.038 127.50 14.555 252.50 20.483 377.50 25.044 502.50 28.895 650.00 32.863
5.00 2.882 130.00 14.697 255.00 20.584 380.00 25.127 505.00 28.967 675.00 33.489
7.50 3.530 132.50 14.838 257.50 20.684 382.50 25.210 507.50 29.038 700.00 34.104
10.00 4.076 135.00 14.977 260.00 20.785 385.00 25.292 510.00 29.110 725.00 34.707
12.50 4.557 137.50 15.115 262.50 20.884 387.50 25.374 512.50 29.181 750.00 35.301
15.00 4.992 140.00 15.252 265.00 20.983 390.00 25.456 515.00 29.252 775.00 35.884
17.50 5.392 142.50 15.387 267.50 21.082 392.50 25.537 517.50 29.323 800.00 36.458
20.00 5.765 145.00 15.522 270.00 21.180 395.00 25.618 520.00 29.394 825.00 37.024
22.50 6.114 147.50 15.655 272.50 21.278 397.50 25.699 522.50 29.464 850.00 37.580
25.00 6.445 150.00 15.787 275.00 21.376 400.00 25.780 525.00 29.535 875.00 38.129
27.50 6.760 152.50 15.918 277.50 21.473 402.50 25.860 527.50 29.605 900.00 38.670
30.00 7.060 155.00 16.048 280.00 21.569 405.00 25.941 530.00 29.675 925.00 39.203
32.50 7.348 157.50 16.177 282.50 21.665 407.50 26.021 532.50 29.745 950.00 39.730
35.00 7.626 160.00 16.305 285.00 21.761 410.00 26.100 535.00 29.815 975.00 40.249
37.50 7.893 162.50 16.432 287.50 21.856 412.50 26.180 537.50 29.884 1000.00 40.762
40.00 8.152 165.00 16.558 290.00 21.951 415.00 26.259 540.00 29.954 1025.00 41.268
42.50 8.403 167.50 16.682 292.50 22.045 417.50 26.338 542.50 30.023 1050.00 41.768
45.00 8.647 170.00 16.807 295.00 22.139 420.00 26.417 545.00 30.092 1075.00 42.263
47.50 8.884 172.50 16.930 297.50 22.233 422.50 26.495 547.50 30.161 1100.00 42.751
50.00 9.115 175.00 17.052 300.00 22.326 425.00 26.573 550.00 30.230 1125.00 43.234
52.50 9.340 177.50 17.173 302.50 22.419 427.50 26.651 552.50 30.298 1150.00 43.712
55.00 9.559 180.00 17.294 305.00 22.511 430.00 26.729 555.00 30.367 1175.00 44.185
57.50 9.774 182.50 17.413 307.50 22.603 432.50 26.807 557.50 30.435 1200.00 44.652
60.00 9.985 185.00 17.532 310.00 22.695 435.00 26.884 560.00 30.503 1225.00 45.115
62.50 10.190 187.50 17.650 312.50 22.787 437.50 26.961 562.50 30.571 1250.00 45.573
65.00 10.392 190.00 17.768 315.00 22.877 440.00 27.038 565.00 30.639 1275.00 46.027
67.50 10.590 192.50 17.884 317.50 22.968 442.50 27.115 567.50 30.707 1300.00 46.476
70.00 10.785 195.00 18.000 320.00 23.058 445.00 27.191 570.00 30.774 1325.00 46.920
72.50 10.975 197.50 18.115 322.50 23.148 447.50 27.268 572.50 30.842 1350.00 47.361
75.00 11.163 200.00 18.229 325.00 23.238 450.00 27.344 575.00 30.909 1375.00 47.797
77.50 11.348 202.50 18.343 327.50 23.327 452.50 27.420 577.50 30.976 1400.00 48.230
80.00 11.529 205.00 18.456 330.00 23.416 455.00 27.495 580.00 31.043 1425.00 48.659
82.50 11.708 207.50 18.568 332.50 23.504 457.50 27.571 582.50 31.110 1450.00 49.084
85.00 11.884 210.00 18.679 335.00 23.593 460.00 27.646 585.00 31.177 1475.00 49.505
87.50 12.057 212.50 18.790 337.50 23.680 462.50 27.721 587.50 31.243 1500.00 49.923
90.00 12.229 215.00 18.900 340.00 23.768 465.00 27.796 590.00 31.310 1525.00 50.337
92.50 12.397 217.50 19.010 342.50 23.855 467.50 27.870 592.50 31.376 1550.00 50.748
95.00 12.564 220.00 19.119 345.00 23.942 470.00 27.945 595.00 31.442 1575.00 51.156
97.50 12.728 222.50 19.227 347.50 24.029 472.50 28.019 597.50 31.508 1600.00 51.560
100.00 12.890 225.00 19.335 350.00 24.115 475.00 28.093 600.00 31.574 1625.00 51.961
102.50 13.050 227.50 19.442 352.50 24.201 477.50 28.167 602.50 31.640 1650.00 52.359
105.00 13.208 230.00 19.549 355.00 24.287 480.00 28.241 605.00 31.705 1675.00 52.755
107.50 13.365 232.50 19.655 357.50 24.372 482.50 28.314 607.50 31.771 1700.00 53.147
110.00 13.519 235.00 19.760 360.00 24.457 485.00 28.387 610.00 31.836 1725.00 53.536
112.50 13.672 237.50 19.865 362.50 24.542 487.50 28.460 612.50 31.901 1750.00 53.923
115.00 13.823 240.00 19.969 365.00 24.626 490.00 28.533 615.00 31.966 2000.00 57.646
117.50 13.972 242.50 20.073 367.50 24.711 492.50 28.606 617.50 32.031 2250.00 61.143
120.00 14.120 245.00 20.176 370.00 24.794 495.00 28.678 620.00 32.096 2500.00 64.450
122.50 14.267 247.50 20.279 372.50 24.878 497.50 28.751 622.50 32.160 2750.00 67.596
125.00 14.411 250.00 20.381 375.00 24.961 500.00 28.823 625.00 32.225 3000.00 70.601
VP = Velocity Pressure (pascals)
V = Velocity (meters per second)
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