Submersible Pumps Explained: Types, Applications, and Limitations
A submersible pump operates fully immersed in fluid, delivering flow with high efficiency for wells, sewers, and industrial processes. This article details pump types,…
PumpCalcs reference library
Author: John C. Wilcox
86 resources
Methods · worked examples · references
How a Centrifugal Pump Works: Components and Operating Principle
A centrifugal pump converts mechanical energy from a driver into fluid kinetic energy using a rotating impeller. Understanding its components, the Euler pump equation,…
Motor Starting Methods Compared: DOL, Star‑Delta, Soft Start, and VFD
A detailed comparison of Direct‑On‑Line, Star‑Delta, Soft‑Start, and Variable‑Frequency Drive motor starting techniques. Learn the theory, calculations, typical ranges, and practical guidance for selecting…
When a VFD Is the Wrong Choice for a Pump: Risks, Alternatives, and Decision Guidance
Variable‑frequency drives (VFDs) can improve pump efficiency, but they are not universally appropriate. This article explains the technical conditions that make a VFD a…
Gear, Diaphragm, and Peristaltic Pumps: Positive Displacement Types Compared
Gear, diaphragm, and peristaltic pumps are the three most common positive‑displacement families. This article explains their operating principles, presents the core flow equation, compares…
How to Choose the Right Pipe Size for a Pump System
Choosing the proper pipe diameter links a pump’s output to the downstream network, affecting efficiency, cost, and reliability. This guide walks through the governing…