Categories: Uncategorized

Pump Basics: Affinity Laws

Law 1- Speed is directly proportional to Flow.

Law 1 means that as RPM is reduced, flow (GPM) is reduced in a linear relationship. For example, if RPM drops to 70% of the original, GPM drops to 70% of the original.

Law 2 – Head is proportional to Flow squared.

Law 2 means that as RPM is reduced, pressure (feet of head) is reduced by the square. For example, if RPM drops to 70% of the original, feet of head would drop by (70% x 70%) = 0.72 = 0.49 or 49% of the original.

Law 2 – Input power is proportional to Flow cubed.

Law 3 means that as RPM is reduced, power consumption (brake horsepower) is reduced by the cube. In the same example the power would drop to (0.7 x 0.7 x 0.7) = (0.7)3 = 0.343 or 34.3% of the original.

Recent Posts

  • Blog

How are Mag Drive Pumps Different from Sealed Pumps?

In the diverse world of industrial pumps, the choice between mag drive (magnetic drive) and…

6 days ago
  • Blog

Best Practices for Maintenance of Industrial Metering Pumps to Avoid Unexpected Downtime

Metering pumps like any mechanical equipment, require regular maintenance to prevent unexpected downtime and operational…

2 weeks ago
  • Blog

Innovations in Metering Pumps for Industrial Applications (Redefining Efficiency and Usability)

Metering pumps play a critical role in ensuring precise chemical dosing and fluid handling across…

3 weeks ago
  • Blog

Assessing the ROI of Upgrading your Industrial Pumps

Efficiency is a necessity in most factories and manufacturing facilities. And when you focus on…

1 month ago
  • Blog

Expert Insights into Pump Selection for the Wastewater Industry

Before installing, upgrading, or replacing pumps in your industrial facility, it's important to assess the…

1 month ago
  • Blog

Unlocking 8 Advantages of Using Drum Pumps for Food Processing

In the food processing industry, maintaining efficiency, safety, and compliance with health standards is crucial.…

2 months ago