Trunnion Ball Valve Flow Coefficients （CV）

Trunnion Ball Valve Flow Coefficients (CV )for Class 150-600, size up to 24 inch. Flow Coefficient indicates the flow rate of a fluid through it when a specific pressure drop is applied.

Trunnion Ball ValveFlow Coefficients(CV )

BODY SIZE		Class 150	Class 300	Class 600
Dn	Inch	Class 150	Class 300	Class 600
80	3	1300	1100	1000
100	4	2300	2200	1800
150	6	5400	5400	4500
200	8	10000	10000	8900
250	10	17800	17100	14500
300	12	26000	25000	22000
350	14	32000	31000	28000
400	16	44000	42000	39000
450	18	58000	56000	51000
500	20	75000	72000	66000
600	24	111200	102000	92000
NOTE: Cv indicates the gallons of water at 16°C / 60°F flowing through the valve bore in 0.0069 MPa / 1 psig differential pressure.

Factors Affecting Cv:

Valve Size: Larger valves generally have higher Cv values.
Valve Design: Different valve designs (like full port vs. standard port) can affect Cv.
Fluid Properties: The density and viscosity of the fluid will affect the flow characteristics.
Temperature: Temperature can also affect the viscosity of fluids.