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Glossary

Affinity Laws and Fan Laws

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Apply affinity laws in a full pump system with the Pump Sizing and Centrifugal Pump Selection: Engineering Workflow.

Go deeper

Article Fan Performance and Fan Laws How the affinity relationships apply to fans and blowers. Article Understanding Pump Curve Basics How a speed or trim change shifts the pump curve and duty point. Article Operating Efficiency of Centrifugal Pumps Keeping the duty point efficient when speed or impeller size changes.

Related content

Guide Orifice Plate Sizing Automatic orifice-plate sizing for flow measurement and restriction. Guide Pumps in Parallel & Series How combined pump curves shift the system operating point. Guide Centrifugal Pump Performance Curve Reading head, efficiency and NPSHr from manufacturer curves.

Reviewed by the FluidFlow Engineering Team · Last reviewed: June 2026 · Applies to FluidFlow v3.54 (steady-state analysis)

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