Toshiba GF630 Instruction Manual page 47

To select the meter size: See Table 9.2 and find meter sizes within the velocity of 0.1 to 10 m/s for a specified
(mm)
full-scale (measureing range high limit) flow. Select one that has its full-scale
velocity between 1 and 3 m/s.
Make sure the full-scale flow rate used for the final planning stage stays
within 10 m/s in terms of flow velocity.
Table 9.2 Flow velocity vs. flow volume
Size
0.1m/s 0.3m/s
15 0.0631 0.1908
25 0.1767 0.5301
32 0.2895 0.8686
40 0.4523 1.357
50 0.7067 2.120
65 1.195 3.583
80 1.809 5.428
100 2.827 8.482
125 4.417 13.25
150 6.361 19.08
200 11.31 33.93
250 17.67 53.01
300 25.45 76.34
350 34.64 103.9
400 45.23 135.7
450 57.25 171.7
500 - 212.2
600 - 305.4
Flow rate
1m/s
0.6361 1.908
1.767 5.301
2.895 8.686
4.523 13.57
7.067 21.20
11.95 35.83
18.09 54.28
28.27 84.82
44.17 132.5
63.61 190.8
113.1 229.3
176.7 530.1
254.5 763.4
346.4 1,039
452.3 1,357
572.5 1,717
706.9 2,121
1,018 3,054
− ４６ −
６Ｆ８Ａ０８８２
Unit: m3/h
3m/s 10m/s
6.361
17.67
28.95
45.23
70.67
119.5
180.9
282.7
441.7
636.1
1,131
1,767
2,545
3,464
4,523
5,725
7,069
10,180