The last R L Deppmann Monday Morning Minute briefly defined the differences between inline and base mounted pumps. When the engineer or contractor is selecting …
How to Pick an HVAC Centrifugal Pump Part 2: Types of Pumps and Seismic Activity Considerations
One of the first decisions you must make when selecting an HVAC pump is to determine which type of pump you need. There are specialty …
How to Pick an HVAC Centrifugal Pump Part 1: Designing for Owner Satisfaction
Hydronic pumps all do the same basic thing—they circulate water. So why are there so many different types and configurations? And what are the criteria …
Condensate Pump Discharge Balance Valves: A New Perspective
The last R L Deppmann Monday Morning Minutes (MMM) focused on the critical relationship between the steam condensate return temperature and proper pump NPSH required …
Return Temperature & Condensate Pumps: Steam & Steam Heat Exchanger Basics Part 15
One challenge to selecting a steam condensate return unit is the return temperature of the condensate after leaving the steam heat exchanger. This week’s R. L. …
Condensate Return Pump and Receiver Sizing Tips: Steam & Steam Heat Exchanger Basics Part 14
Hopefully, the message from past R. L. Deppmann Monday Morning Minutes was clear: don’t lift the condensate out of a steam heat exchanger or coil …
Steam Pipe Sizing: Steam and Steam Heat Exchanger Basics Part 5
Steam pipe sizing is easy with today’s sizing programs. What is behind the programs? This question and others like it are answered in the R …
Parallel Pumping: 2-Position Control Valves on Multiple Cooling Towers (Part 5)
Over the last few weeks the Monday Morning Minutes posts have looked at pumping issues with multiple condensers and pumps. One of our most-received questions …
Parallel Pumping with Unequal Condensers (Part 4)
Over the last few weeks our Monday Morning Minutes posts have looked at pumping issues with parallel, equal-sized condensers and pumps. This week we will look …
Parallel Pumping in Condenser Applications: Automatic Differential Pressure Control (Part 3)
Chilled water condensers are normally operated as constant-flow devices and the pumps serving them are constant-speed. Why would you ever use a variable-speed drive for …