| 仪表口径（mm） |
仪表系数(次/L) |
频率下限（HZ） |
频率上限（HZ） |
| DN 4 |
16000 |
177.8 |
1111.1 |
| DN 6 |
8200 |
227.8 |
1366.7 |
| DN 10 |
1800 |
100.0 |
600.0 |
| DN 15 |
830 |
138.3 |
1383.3 |
| DN 20 |
600 |
133.3 |
1333.3 |
| DN 25 |
212 |
58.9 |
588.9 |
| DN 32 |
150 |
62.5 |
625.0 |
| DN 40 |
77 |
42.8 |
427.8 |
| DN 50 |
27 |
30.0 |
300.0 |
| DN 65 |
12.1 |
23.5 |
235.3 |
| DN 80 |
6.1 |
16.9 |
169.4 |
| DN 100 |
4.3 |
23.8 |
238.9 |
| DN 125 |
3.1 |
21.5 |
215.3 |
| DN 150 |
2.2 |
18.3 |
183.3 |
| DN 200 |
1.2 |
26.7 |
266.7 |
