Ball Valve Flow Coefficients - Cv

Flow coefficients - Cv - for typical ball valves - reduced and full bore

A conventional ball valve is normally not used as a throttling valve since a partial flow will create high velocity flow tear at the ball and the seal.

Full Bore Valves

Typical flow coefficients - Cv - for full bore valves:

Valve Size
inches1/23/411
1/2
22
1/2
34681012141618
mm12192537.55062.575100150200250300350400450
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
inches3468101214161820
mm75100150200250300350400450500
Flow Coefficient
C
v
420 770 1800 2500 4500 8000 12000 14000 18000 22000

Related Topics

  • Piping Systems - Dimensions of pipes and tubes, materials and capacities, pressure drop calculations and charts, insulation and heat loss diagrams
  • Control Valves - Control Valve terminology, bodies, trim, flow characteristics, Cv and Kv sizing, noise, actuators and positioners

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  • en: ball valves flow coefficients
  • es: válvulas de bola coeficientes de caudal
  • de: Kugelhähne Durchflusskoeffizienten

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