Calculation Programs

k_v value

In order to calculate the k_v value the flow Q, the density ρ₁ of the media at the valve inlet and the pressure drop (Δp) across the valve must be known:

Q	=		m³/h			=		m³/h
ρ1	=		kg/m³
Δp	=		bar

 

Flow

In order to calculate the flow Q the k_vvalue, the density ρ₁ of the media at the valve inlet and the pressure drop (Δp) across the valve must be known:

kv	=		m³/h			=		m³/h
ρ1	=		kg/m³
Δp	=		bar

 

Pressure Drop

In order to measure the pressure drop Δp the k_v value, the density ρ₁ of the media at the valve inlet and the flow Q must be known:

kv	=		m³/h			=		bar
ρ1	=		kg/m³
Q	=		m³/h

 

Calculations for Gases

k_v value

In order to calculate the k_v value the volumetric flow Q_N at 1013 hPa and 0°C, the standard density ρ_N of the media, the pressure drop (Δp) across the valve, the media pressure p₂ downstream of the valve and the media temperature at the valve inlet must be known:

Qn	=		Nm³/h			=		m³/h
ρn	=		kg/Nm³
Δp	=		bar
p2	=		bar			=		m³/h
T1	=		°C °F

 

Flow

In order to calculate the flow Q_N the k_v value, the standard density ρ_N of the media, the pressure drop (Δp) across the valve, the media pressure p₂ downstream of the valve and the media temperature at the valve inlet must be known:

kv	=		m³/h			=		Nm³/h
ρn	=		kg/Nm³
Δp	=		bar
p2	=		bar			=		Nm³/h
T1	=		°C °F

 

Pressure Drop

In order to calculate the pressure drop Δp the k_v value, the volumetric flow Q_N at 1013 hPa and 0°C, the standard density ρ_N of the media, the media pressure p₂ downstream of the valve and the media temperature at the valve inlet must be known:

kv	=		m³/h			=		bar
Qn	=		Nm³/h
ρn	=		kg/Nm³
p2	=		bar					if
T1	=		°C °F

 

Flow Q for liquids in l/min