Pump Motor Sizing: Why the Duty-Point Calculation Is Only the First Line
A motor can look adequate at the rated duty and still overload when the operating point moves. This worked example separates hydraulic, shaft and electrical power.
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NPSH Available vs Required: A Worked Calculation That Changes with the Site
NPSHA is created by the system, while NPSHR belongs to the pump. This worked metric example shows how temperature, elevation and suction loss can erase an apparently comfortable margin.
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Pipe Diameter and Pumping Cost: The Decision That Outlives the Pump
A smaller pipe costs less to buy, but its higher velocity and friction can require extra pump power for years. This worked example puts numbers on the trade-off.
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Pump Life-Cycle Cost: Turn Flow and Head into a Number the Buyer Can Use
Purchase price is visible once; wasted head appears on every electricity bill. This worked example shows how to compare pump options using operating data rather than price alone.
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How to Read a Pump Curve Without Missing the Numbers That Matter
A pump curve contains more than flow and head. This worked example shows how to check the duty point, efficiency, shaft power, operating region and NPSH3 before approving a selection.
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How to Size a Centrifugal Pump Without Oversizing It
A reliable pump selection starts with the system, not the catalogue. This practical guide explains how to define the duty point and choose a pump that will operate efficiently without unnecessary oversizing.
