How to Determine Control Head for a Variable Speed Pumping System

How to Determine Control Head for a Variable Speed Pumping System

To control a variable speed pumping system, we must determine the minimum operational head of the system. Some refer to this value as constant head, minimum head, independent head, etc. Throughout this and in other JMP blogs, we refer to it as ...

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Manual Versus Automatic Balance in a Variable Speed Pump Control System

Manual Versus Automatic Balance in a Variable Speed Pump Control System

We’ve talked about manual versus automatic balancing methods and we’ve talked about curve control versus area control. Now it’s time to consider the balance valve type impact on the pump control area. Let’s start this conversation with a question...

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Variable Speed Pump Control: How Variations in Demand Load Define the Control Area

Variable Speed Pump Control:  How Variations in Demand Load Define the Control Area

In our last blog, we showed you what happens in a variable speed system when load drops. For clarity, we chose an unrealistically simple example of a system with only one coil. Today we’re going to give our system a small dose of reality by incorporating multiple zones...

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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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Variable Speed Pump Control: Area Control Versus Curve Control

Variable Speed Pump Control: Area Control Versus Curve Control

In our last blog, we left you with two new terms, “Control Curve” and “Control Area,” indicating that any variable speed control strategy will be based on one or the other. What are these strategies and how do they differ?  Before we pull out the curves, schematics and calculations, let’s start with a simple analogy...

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