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HVAC Centrifugal Pump Speed
HVAC Centrifugal Pump Speed

How to Pick an HVAC Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors

RL Deppmann April 8, 2024Pumps, Variable Speed, Selection and Specification, Operation, Water Heaters, Speed, Speed

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 …

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Basic Centrifugal Pump Selection: Which Pump Do I Choose? (Part 2 of 2)

RL Deppmann April 1, 2024Pumps, Selection and Specification

When looking at pumps, the one question every HVAC and Plumbing engineer will ponder is “which pump do I choose?” There are several factors that …

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specificationPumpsSelection

Basic Centrifugal Pump Selection: Which Pump Do I Choose? (Part 1 of 2)

RL Deppmann March 25, 2024Pumps, Selection and Specification

When looking at pumps, the one question every HVAC and Plumbing engineer will ponder is “which pump do I choose?” There are several factors that …

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pump selectionpump specification

Variable Speed Pump Control: Wheels and Ladders and Diversity

RL Deppmann March 18, 2024Selection and Specification, Variable Speed, Control, Pumps

Commercial and industrial hydronic heating and cooling systems will usually have variable speed distribution pumps. There are multiple ways to identify what speed the pumps …

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specificationControlPumpsSelectionvariable speed

Variable Speed Systems: Types of Sensors (Part 2)

RL Deppmann March 11, 2024Pumps, Selection and Specification, Variable Speed, Control

Last week, in part one of this series, we looked at temperature, pressure, and differential pressure sensors to control the speed of a HVAC or …

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Variable Speed Systems: Types of Sensors (Part 1)

RL Deppmann March 4, 2024Selection and Specification, Pumps

The variable frequency drive can vary the speed of the centrifugal pump from zero to speeds over the nameplate of the motor. Of course, the …

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specificationPumpsSelection
example high school system diagram
example high school system diagram

Control Head: Quiz Answers and a Thought on Variable Speed Pump Selection

RL Deppmann February 26, 2024Monday Morning Minutes, Pumps, Selection and Specification

In the last R. L. Deppmann Monday Morning Minutes (MMM), What is Control Head in Hydronic Variable Speed Pumping?,  we mentioned a quiz and asked …

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Pumpsselection and specificationcontrol head

What is Control Head in Hydronic Variable Speed Pumping?

RL Deppmann February 19, 2024Monday Morning Minutes, Pumps, Hydronic Design, Selection and Specification, Curves, Affinity Laws

Control head is a term used in many different industries. What is the control head in our world of variable speed pumping hydronic and plumbing …

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hydronic variable pumpingvariable pumpingcontrol head

Variable Speed Pump Motors and Drives

RL Deppmann February 12, 2024Affinity Laws, Affinity Laws, Monday Morning Minutes, Pumps, Hydronic System Design, Selection and Specification, Curves, Efficiency, Speed

  Danfoss VFD Motor Efficiency Terms Bell & Gossett ECM Pump   Variable speed centrifugal pumps in building heating, cooling, and plumbing systems use a …

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affinity lawsvariable speed pump motorsVariable Speed Drivehydronic system design
heat or cool variable flow system chart
heat or cool variable flow system chart

Developing Variable Speed Pump Curves

RL Deppmann February 5, 2024Pumps, Hydronic System Design, Selection and Specification, Curves, Efficiency, Speed, Affinity Laws, Monday Morning Minutes, Affinity Laws

Most heating and cooling pumps in commercial buildings operate in a variable speed mode. Today, we take your Monday Morning Minutes to explore the variable …

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selection and specificationhydronic system designpumpspump curvesvariable speedaffinity laws
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  • Products
    • Overview
    • Pumps and Accessories
    • Boilers and Water Heaters
      • Water Heater Stock
      • Boiler Stock
    • Hydronic Systems
    • Plumbing Systems
    • Steam and Condensate
    • Variable Frequency Drives (VFDs)
    • Glycol Solutions
    • Snowmelt Designs
  • System Design
    • Overview
    • Project Gallery
    • Selection and Design Tools
  • Water Solutions
  • Contractors
  • Service & Parts
    • Overview
    • Startup and Warranty
    • Parts
    • Service and Maintenance
  • Education
    • Overview
    • Basic Hydronic Blog Articles
    • Training Opportunities
    • Factory Classes
  • About RLD
    • Overview
    • Team Deppmann
    • R.L. Deppmann Locations
    • Careers
    • Community Engagement
    • Press and News