PUROXI DESIGN CENTRE

Pump Selection for Puroxi Nano Bubble Nozzles

Select a pump from the required nozzle flow and pressure at the real operating point. The pump connection size or maximum-flow label alone is not enough.

UNDERSTAND THE SYSTEM FIRST

Four Things to Know Before Using the Calculator

Water moving from the source through a pump and Puroxi nozzle before returning as treated water — **The complete water loop**The pump must move the required flow through all pipework and deliver the required pressure at the nozzle.

Comparison between a submersible pump in the water and a surface pump installed outside the water — **Submersible or surface pump**Both use the same hydraulic calculation. The installation and suction requirements are different.

Static elevation measured vertically from the source water surface to an elevated discharge point — **Static elevation**Same pond or tank normally means 0 m. Otherwise enter only the vertical rise above the source-water surface.

Pump curve showing the required duty point where system flow meets total dynamic head — **The pump duty point**The selected pump curve must deliver the required flow at the calculated total dynamic head.

INTERACTIVE PRELIMINARY CALCULATOR

Build the Required Pump Duty Point

Use the information you know. The calculator estimates the remaining values and clearly identifies what the pump supplier must confirm.

How to Use the Puroxi Pump Selection Calculator

Puroxi nozzle model The selected model supplies the preliminary flow per nozzle. Number of nozzles Enter the number operating from the same pump at the same time.

Pump arrangement Submersible pump Surface pumpThis changes the installation guidance, not the hydraulic equations.

Does water return to the same pond or tank? Yes NoSelect Yes when the source and return water surfaces are effectively the same elevation.

Approximate total pipe length mFollow the full pipe route from the pump to the nozzle. Pipe internal diameter mmUse the manufacturer’s inside diameter, not the outside diameter. Pipe material Used only for the preliminary pipe-friction estimate.

Fittings and equipment

Enter only the items located between the pump and the nozzle.

90° elbows 45° elbows Full-port ball valves Check valves Filters or strainers Manifolds

Advanced assumptions

Nozzle inlet pressurepsi40 psi is a general starting reference. Confirm the approved value for the project. Preliminary design allowance%Applied after pressure, lift and losses. Avoid excessive oversizing. Estimated pump efficiency%Changes estimated input power only. It does not change flow or head.

Pipe Sizing Assistant

Preliminary comparison	Your pipe	Suggested pipe

Pipe sizes are inside diameters. This preliminary comparison assumes one common pipe run at full system flow. Branches, manifolds, suction piping, discharge backpressure and actual pump curves require separate review.

Before Purchasing a Pump

Check the pump curve

Confirm that the pump delivers the required flow at the calculated head—not merely at zero head.

Confirm the electrical supply

Match voltage, phase, frequency, motor service factor and controls to the installation.

Commission the system

Measure actual flow, inlet pressure, gas delivery and motor load after installation.

Preliminary calculation only. Puroxi must confirm the nozzle model, operating pressure, water source, pipe size and length, fittings, elevation, materials, electrical supply and manufacturer’s pump curve before final selection.