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Basic Concepts > General
> Fluid Basics
Espaņol
Concepts
Flow Coefficient CV and Kv
Flow Coefficient comparative
Flow coefficient for ball valve
Flow coefficient for butterfly valve
Discharge Coefficient
Reynolds Number
Flow Equations - Online Calculation
Flow Coefficient (Cv and Kv)
Pressure drop Coefficient zeta (ζ)
Discharge Coefficient (C)
Flow Rate (Q)
Flow velocity (v)
Head drop (Δh)
Pressure drop (ΔP)
Cavitation Number
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Cv Flow Coefficient for ball valves
Cv Flow Coefficient in 100% opened Ball valves
Valve Size
Cv [gpm] [psi]
NPS
(inches)
DN
(mm)
Full Bore
Reduced Bore
Jamesbury
series 9000
Bac
FB FB-L
Bac
PQR-i
1/2
15
9
20
8
3/4
20
50
50
16
1
25
100
100
31
1-1/2
40
270
240
98
2
50
490
400
117
3
80
1.160
1.000
340
4
100
2.200
1.700
650
6
150
5.100
4.000
1.050
8
200
9.300
7.400
1.440
10
250
15.200
-
3.000
12
300
22.400
-
4.800
14
350
27.000
-
-
16
400
37.000
-
-
18
450
47.000
-
-
20
500
60.000
-
-
(*) Data from catalogues.
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