Instemi
Control Valve Flowrate Calculations
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Reference
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Notes
Upstream Piping Data
Nominal Size
DN
NPS
Schedule
Wall Thickness
mm
in
Piping specification not known yet
Downstream Piping Data
Nominal Size
DN
NPS
Schedule
Wall Thickness
mm
in
Piping specification not known yet
Control Valve Data
Type
Butterfly
V-Notch Ball
Conventional Ball
Eccentric Plug
Globe - Linear
Globe - Equal Percentage
Globe - Quick Opening
Valve Nominal Size (d)
Not Selected
Selected
NPS
DN
Valve Opening
Fully Open
Partially Open
%
degree
Flow Coefficient (C
v
)
Use samples table
Use rated value
Liquid Pressure Recovery Factor (F
L
)
Use samples table
Use rated value
Pressure Differential Ratio Factor (x
T
)
Use samples table
Use rated value
Valve Style Modifier (F
d
)
Use samples table
Use rated value
Process Data
Duplicate last case
Add new case
General
Remove case
Calculation Target
Liquid Flowrate
Gas Flowrate
None
Case
Inlet Pressure
(p
1
)
bar a
bar g
kPa a
kPa g
psi a
psi g
Outlet Pressure
Pressure Drop
(p
2
)
bar a
bar g
kPa a
kPa g
psi a
psi g
Liquid Phase
Density
(ρ)
kg/m³
lb/ft³
lb/in³
Dynamic Viscosity
Kinematic Viscosity
(ν)
cSt
m²/s
Vapor Pressure
(p
v
)
bar a
bar g
kPa a
kPa g
psi a
psi g
Critical Pressure
(p
c
)
bar a
bar g
kPa a
kPa g
psi a
psi g
Gas Phase
Molecular Weight
(M)
kg/kmol
Inlet Temperature
(T
1
)
ᵒC
ᵒF
K
Compressibility Factor
(Z)
Dynamic Viscosity
Kinematic Viscosity
(ν)
cSt
m²/s
Specific Heat Ratio
(γ)
Calculation
Calculate
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