How do I calculate Flow Normalisation (qnN)?

To calculate Flow Normalisation (qnN): Enter Flow at operating conditions, Operating pressure P, Operating temperature T. Click Calculate. INDUGRID computes the result instantly using the formula: qnN = qN × (P + 1.01325) / 1.01325 × 293.15 / (T + 273.15). No registration required.

What units does the Flow Normalisation (qnN) calculator use?

The Flow Normalisation (qnN) calculator uses the following units: nl/min, bar, °C. SI units are used by default.

Is the Flow Normalisation (qnN) calculator free?

Yes. The INDUGRID Flow Normalisation (qnN) calculator is completely free, requires no account or login, and works on desktop and mobile browsers.

Pneumatics

Flow Normalisation (qnN)

Convert actual volumetric flow at operating conditions (pressure + temperature) to normalised flow at standard conditions (1.01325 bar, 20°C = 293.15 K).

Units:

in LinkedIn

💡Always compare valve and cylinder flow values at the same reference conditions. The ISO standard reference condition is 101,325 Pa and 293.15 K (20°C). A valve rated at 1600 nl/min at 6 bar delivers much less actual volume per second than at 1 bar.

qnN = qN × (P + 1.01325) / 1.01325 × 293.15 / (T + 273.15)

Input

Flow at operating conditions iMeasured or calculated flow at the operating pressure and temperature in normal-litres per minute.

nl/min

Operating pressure P iGauge pressure at which the flow is measured in bar.

bar

Operating temperature T iTemperature at which the flow is measured in °C.

°C

Result

Absolute pressure [bar] —

Normalised flow qnN [nl/min] —

Normalisation factor —