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This blog introduces efficiency curves (islands) to our pump curve and examines the variables impacting pump efficiency. We also introduce a valuable equation for....
Read MoreIn Part 2 of our How to Build a Centrifugal Pump Curve series, we added five head/capacity curves to the e-1510 4BD pump curve we are building. These curves reflect the tested performance of pumps with various-size impellers. Now, it's time to focus on the pump’s power requirement and how it....
Read MoreIn Part 1 of our Building a Pump Curve series, we discussed the parts of an unplotted pump curve. Now it's time to add some curves! In Figure 1, we've added a single head/capacity curve for a 9.5-inch diameter impeller--the largest impeller that can be used with our example pump, a Bell & Gossett e-1510 4BD. During laboratory tests...
Read MoreUnderstanding centrifugal pump curves is essential for designers and installers of hydronic HVAC and plumbing systems. These handy charts provide a wealth of information about a pump's performance capability and help us...
Read MoreThe 2019 edition of ASHRAE Standard 90.1 incorporates a change that significantly impacts the design of high-capacity space heating gas boilers. The standard mandates that gas boilers ranging from 1 to 10 million Btu/h) must be…
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