## KV-value for gas

### KV-value for gas

Input Result
Flow qn=
Temperature before valve T1= ˚C ˚C
Pressure before valve P1=
Pressure after valve P2=
Density ρn= kg/m3 kg/m3
KV m3/h m3/h
CV Usgal/min

### Pressure

Refers to how great the pressure before and after the valve is.

### Flow

How big flow passing the valve.

### Temperature

Does the temperature of the medium before it reaches the valve.

### Density

The density of the gas passing through the valve. In the original case, the liquid is assumed to be water.

### KV-value

KV = Water flow in m3 / h at a pressure drop across the open valve of 1 bar (100 kPa).

kvs = The selected valve Kv-value at fully open valve. Typically a 30% safety margin to the calculated Kv value.

Difference between Kv and kvs
Kv-value the value component and have KV-value is the value that the component is expected to have operating case.

### CV value

CV-value is the American equivalent to CV value. CV-value is defined as the water flow in U.S. gallons over a fully open valve with a pressure of 1 psi.