A Better Way to Compare Pump Efficiency

A Better Way to Compare Pump Efficiency

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….

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How to Pick a Centrifugal Pump Part 8: Motor Speed Considerations

How to Pick a Centrifugal Pump Part 8: Motor Speed Considerations

How does RPM (revolutions per minute) impact pump operation? And what RPM is best suited for hydronic applications? A pump’s RPM or “synchronous speed” is determined by the number of magnetic poles in the motor winding as they interact with...

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Part Load Efficiency Values (PLEV) Part 5: BTUH Load Output vs. Percent of Flow Tolerance

Part Load Efficiency Values (PLEV) Part 5: BTUH Load Output vs. Percent of Flow Tolerance

We recently introduced the part load efficiency value (PLEV) aspect of the Bell & Gossett online pump selection tool. PLEV for pumps is based on flow rate while the Integrated Part Load Value (IPLV) for chillers is based on load. This final segment on PLEV will look at the difference.

Let’s begin by examining....

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Part Load Efficiency Values (PLEV) Part 4: End of Curve Selections

Part Load Efficiency Values (PLEV) Part 4: End of Curve Selections

When looking at Bell & Gossett pump selections we often find higher part load efficiency (PLEV) pump choices are to the right of BEP or best efficiency point. How close to end of curve should a prudent engineer choose?

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Part Load Efficiency Values (PLEV) Part 3: 3500 vs. 1750 HVAC Pump Selections

Part Load Efficiency Values (PLEV) Part 3: 3500 vs. 1750 HVAC Pump Selections

In our last two blogs, we discussed Part Load Efficiency Value (PLEV) from Bell & Gossett. Today we will discuss how using PLEV as the only criteria for selection can lead to HVAC pump selections that aren’t necessarily the best choice...  

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