Variable Speed Pump Control: A Quick Review of Fundamentals and Terminology

Variable Speed Pump Control: A Quick Review of Fundamentals and Terminology

We are now three blogs into our series on Variable Speed Pump Control and we are going to hit the pause button and review some fundamentals. If sequentially that seems like a strange thing to do, there is a method to our madness...

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How to Pick a Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors

How to Pick a Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors

There are times when slightly more capacity or a little more safety factor is warranted in a pump selection. Often we are asked about increasing the speed of the motor above the nameplate rated RPM. There are several things to examine.... 

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Modern Pump Selection Part 2: Theory Vs. Real World Operation of Variable Flow Pumping

Modern Pump Selection Part 2:  Theory Vs. Real World Operation of Variable Flow Pumping

In variable speed pumping systems, does zero load ever result zero pump speed?

Practically speaking, the answer is no.  In closed hydronic systems with 2-way valves there is almost always some amount of differential pressure created by continuous impeller rotation – even when....

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