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Typical flow coefficients - Cv - for ball valves - reduced and full bore
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Conventional ball valves are normally not used as throttling valves since partial flow will create high velocity flow tear at the ball and seals.
Typical flow coefficients - Cv - for full bore valves:
| Valve Size | |||||||||||||||
| inches |
1/2 |
3/4 |
1 | 1
1/2 |
2 | 2
1/2 |
3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 |
| mm | 12 | 19 | 25 | 37.5 | 50 | 62.5 | 75 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 |
| Flow Coefficient Cv |
26 | 50 | 94 | 260 | 480 | 750 | 1300 | 2300 | 5400 | 10000 | 16000 | 24000 | 31400 | 43000 | 57000 |
Typical flow coefficients - Cv - for reduced bore valves:
| Valve Size | ||||||||||
| inches | 3 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 |
| mm | 75 | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 |
| Flow Coefficient Cv |
420 | 770 | 1800 | 2500 | 4500 | 8000 | 12000 | 14000 | 18000 | 22000 |
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