Control valve calculator

calculation of flow coefficient - Cv or Kv

online since 2007

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Action
Calculation setup
Flow rates and velocity
Coefficients and pressure drop
Fluid properties

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Description

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custom fluid properties
K factor for fittings, resistance coefficient
compressible isothermal flow
dry air isothermal flow
gas discharge flow
natural gas flow

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Issues and answers

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issues and answers

Description

q - volumetric flow rate
Fluid flow rate in terms of units of volume per unit of time
ṁ - mass flow rate
Fluid flow rate in terms of units of mass per unit of time
V - velocity
Flow velocity in terms of units of distance per unit of time
D - internal diameter
Internal circular pipe diameter
Cv - flow coefficient
In imperial units - gpm
Kv - flow coefficient
In metric units - m3/h
p - pressure
Fluid pressure at the start of the pipe for gas density calculation based on the ideal gas state equation
ρ - fluid density
Mass per unit of volume

Calculation setup

Select value to calculate. You should enter not selected one.
q/ṁ
Calculate flow rate
Δp
Calculate pressure drop
Cv/Kv
Calculate flow coefficient
Select value to input. You should enter selected one. The other one will be calculated
q
volumetric flow rate
mass flow rate
Select value to input. You should enter selected one. The other one will be calculated.
Cv
flow coefficient in imperial units - gpm
Kv
flow coefficient in metric units - m3/h
Select value to input. You should enter selected one. The other one will be calculated.
v
flow velocity
D
internal pipe diameter

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