Pump Vibration Basics: What to Measure and What Limits Apply
Pump vibration monitoring is essential for early fault detection and reliable operation. This article outlines the key parameters to measure, the governing equations, typical…
PumpCalcs reference library
Author: John C. Wilcox
86 resources
Methods · worked examples · references
How to Size a Pool Pump: Turnover Rate, Flow, and Why Bigger Is Worse
Properly sizing a pool pump hinges on the turnover rate and required flow, not on simply picking the biggest motor. This article explains the…
Mechanical Seals vs Gland Packing: Selection, Installation, and Maintenance
A detailed guide comparing mechanical seals and gland packing for centrifugal and positive‑displacement pumps. Learn how to select the right sealing method, install it…
Premature Bearing Failure in Pumps: Why It Happens and How to Stop It
Bearing failures are a leading cause of unexpected pump downtime. This article explains the mechanical and operational reasons behind premature bearing wear, presents the…
End Suction, Split Case, and Vertical Turbine Pumps Compared: Design, Performance, and Selection
A detailed comparison of end‑suction, split‑case, and vertical turbine centrifugal pumps, covering their operating principles, performance equations, typical ranges, and selection guidance. The article…
How Variable Frequency Drives Save Energy on Pumps (and How Much)
Variable Frequency Drives (VFDs) exploit pump affinity laws to match motor speed with system demand, cutting electricity use dramatically. This article explains the physics,…
Wastewater and Sewage Pump Selection: Solids Handling and Wet Well Design
Choosing a pump for wastewater and sewage applications requires accounting for suspended solids and correctly sizing the wet well. This guide presents the governing…
Slurry Pump Selection: Derating, Wear, and Solids Handling – A Technical Guide
Choosing the right pump for abrasive slurries requires careful derating, wear‑rate prediction, and solids‑handling strategies. This article explains the governing equations, design variants, and…
Three-Phase vs Single-Phase Pump Motors: What Changes and Why It Matters
Choosing between three‑phase and single‑phase pump motors alters power density, efficiency, wiring size, and reliability. Understanding the electrical equations, starting‑torque differences, and typical design…
How to Size a Pump Motor: Horsepower, Service Factor, and Safety Margin
A step‑by‑step guide to calculating the correct motor size for a centrifugal pump, including horsepower, service factor, and safety margin. Learn the governing formulas,…