PumpToolkit Blog
Pump Engineering Articles
Practical pump engineering notes, formulas, guides and explanations.
Pump Affinity Laws Explained
Speed changes, impeller trimming, VFD applications and real-world limitations.
What is NPSH? A Complete Guide for Pump Engineers
Understand NPSHa, NPSHr, cavitation risk, margin and NPSH testing.
Recommended Pipe Velocities for Pump Systems
Suction and discharge velocity guidance for pump applications.
What are Ns and Nss?
Pump specific speed and suction specific speed explained.
What is API 610 and Why is it Used?
Heavy-duty centrifugal pump requirements for refinery and petrochemical service.
What is API 685 and Where is it Used?
Sealless centrifugal pumps, magnetic drive pumps and canned motor pumps.
Motor Sizing for Centrifugal Pumps
Rated point, end-of-curve power, service factor and VFD considerations.
Pump Couplings: Flexible Elements, Disc Couplings and Spacer Designs
Coupling types and practical selection checks.
Why Mechanical Seals Replaced Soft Packing in Modern Pumps
Leakage, maintenance, cartridge seals and modern sealing expectations.
Why We Started PumpToolkit
Background of the project and what engineering tools we plan to build.