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Comparing pump efficiency just got a whole lot easier thanks to a new rating system developed by the Hydraulic Institute (HI). For the first time ever, pump specifiers or purchasers can go directly to an online tool where they can compare the numerical efficiency scores of any pump….
Read MoreToday’s flow balancing devices for variable flow pumping systems fall into three main types...
Read MoreComfort and efficiency are the ultimate goals of variable speed pump control. As technical as the discussions may become, it all comes back to comfort and efficiency. With that in mind, let’s review the concept of diversity, because managing system diversity enables us to...
Read MoreIn 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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What happens when demand drops in a closed loop variable speed system? What is the operational sequence and what logic does the controller use to vary the speed of the pump? Let’s begin our discussion with the following...
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