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Principle of Variable Flow Meter(Rotameter)
- Scale notation on tapered tube of flow meter
Scale notation on tapered tube of flow meter
| Total length | Flow range(e.g.:ML/MIN) | Scale Interval (e.g.:ML/MIN) | Notation number(e.g.:ML/MIN) |
| L=80 | 0.1-1(10-100) | 1/20(5) | 10, 50, 100 |
| 0.2-2(20-200) | 1/20(10) | 20, 100, 200 | |
| 0.3-3(30-300) | 1/12(25) *1/15between 0.3 and 0.5 only(20 between 30 and 50 only) | 30, 50, 100, 150, 200, 250, 300 | |
| 0.5-5(50-500) | 1/20(25) | 50, 100, 200, 300, 400, 500 | |
| L=100 | 0.1-1(10-100) | 1/20(5) | 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 |
| 0.2-2(20-200) | 1/20(10) | 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 | |
| 0.3-3(30-300) | 1/30(10) | 30, 50, 100, 150, 200, 250, 300 | |
| 0.5-5(50-500) | 1/25(20)*1/50 between 0.5 and 0.6 only(10 between 50 and above only) | 50, 100, 200, 300, 400, 500, | |
| L=120 | 0.1-1(10-100) | 1/20(5) | 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 |
| 0.2-2(20-200) | 1/20(10) | 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 | |
| 0.3-3(30-300) | 1/30(10) | 30, 50, 100, 150, 200, 250, 300 | |
| 0.5-5(50-500) | 1/25(20) | 50, 100, 200, 300, 400, 500, | |
| L=150 | 0.1-1(10-100) | 1/40(2.5) | 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 |
| 0.2-2(20-200) | 1/40(5) | 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 | |
| 0.3-3(30-300) | 1/30(10) | 30, 50, 100, 150, 200, 250, 300 | |
| 0.5-5(50-500) | 1/50(10) | 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, | |
| L=200 | 0.1-1(10-100) | 1/50(2) | 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 |
| 0.2-2(20-200) | 1/80(2.5) | 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 | |
| 0.3-3(30-300) | 1/60(5) | 30, 50, 100, 150, 200, 250, 300 | |
| 0.5-5(50-500) | 1/50(10) | 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, | |
| L=250 | 0.1-1(10-100) | 1/100(1) | 10, 20, 30, 40, 50, 60, 70, 80, 90, 100 |
| 0.2-2(20-200) | 1/100(2) | 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 | |
| 0.3-3(30-300) | 1/60(5) | 30, 50, 100, 150, 200, 250, 300 | |
| 0.5-5(50-500) | 1/100(5) | 50, 100, 150, 200, 250, 300, 350, 400, 450, 500, |
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