There are times when a little more capacity or a little more safety factor is needed from a pump selection. Often, we are asked about …
Centrifugal Pumps: How Do They Work?
How a centrifugal pump moves water may seem too basic for engineers and contractors to spend time reading about. However, understanding how a centrifugal pump …
Variable Speed Pump Control – More Detailed Curve and Area Control
Curve control, Area control, Sensorless control, Remote DP sensor control. Local sensor control: the shopping cart of speed pump controls can get overwhelming. We just …
Hydronic Pump Energy: Motor & VFD Efficiency – How Low Can You Go?
I’m in the middle of the series of blogs on parallel pumping. We can’t ignore the efficiency of variable frequency drives and motors when looking …
Over-Speeding of B&G Variable Speed Pumps
I hope everyone had a wonderful Thanksgiving celebration. Here at Deppmann, we are thankful for the great industry we serve and the great people who …
Variable Speed Pump Area Control & System Diversity: Part 3
In the R. L. Deppmann Monday Morning Minutes part 1 of this series we defined diversity in hydronic systems. Part 2 introduced the sensorless pump speed …
HVAC Variable Speed Pump Curve Control: Part 2
The HVAC engineer or designer has many choices when it comes to the control of variable speed pumps. The traditional differential pressure (DP) transmitter near …
HVAC Variable Speed Pump Control System Diversity: Part 1
HVAC variable speed pump control does not have to be complicated. Often times a simple differential pressure sensor (DP) at the farthest point from the …
Bell & Gossett Brings Independence to Pump Selection with ESP-Systemwize
Photo by Radiant Shutters on Flickr On July 2, 1776, General Howe landed his fleet in New York and unloaded the first wave of 19,000 …
HVAC Variable Speed Pump Control Head: Part 2
In the last R. L. Deppmann Monday Morning Minutes (MMM), we introduced the basic concept of an HVAC variable speed pump control head, modeling a …
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