Tool

Flow rate calculator

Enter pipe diameter and flow velocity to determine volumetric flow rate and recommended valve size.

Recommended protection device

Enter values and calculate to see a recommendation with the supporting regulation citation.

How to use this tool

STEP

Choose internal diameter (mm) and a typical flow velocity for the service.

STEP

The tool returns volumetric flow in l/s and m³/h.

STEP

Match the result to a DN that keeps velocity inside the recommended band.

Regulation guide

ED devices for Fluid Category 3 and the cases where they are no longer sufficient.

Sizing, materials and isolation strategy for protected wholesome supplies.

Reduced pressure zone valves — installation, AIM, annual testing and Fluid Category 4 protection.