Ball Valves and typical Flow Coefficients - Cv

Typical flow coefficients - Cv - for ball valves - reduced and full bore

Conventional ball valves are normally not used as throttling valves since partial flow will create high velocity flow tear at the ball and seals.

Full Bore Valves

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
C
v
26 50 94 260 480 750 1300 2300 5400 10000 16000 24000 31400 43000 57000

Reduced Bore Valves

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
C
v
420 770 1800 2500 4500 8000 12000 14000 18000 22000

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  • en: ball valves flow coefficients
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  • de: Kugelhähne Durchflusskoeffizienten

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