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