Calculate by operating zone
For each simultaneous zone, total design flow equals the number of active nozzles multiplied by verified nozzle flow at the intended working pressure.
- Separate simultaneous and alternating zones
- Use supplier-confirmed nozzle data
- Record allowance and uncertainty
Check the hydraulic path
Estimate losses through pipe, fittings, valves and filters, then confirm adequate pressure at the hydraulically most disadvantaged nozzle. Validate the final duty against a pump curve.
Prepare the technical RFQ
Include layout dimensions, elevations, pipe preference, nozzle spacing target, water and power data, operating schedule, ambient conditions and required controls.