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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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control headPumpsselection and specification

What is Control Head in Hydronic Variable Speed Pumping?

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

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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control headhydronic variable pumpingvariable pumping

Variable Speed Pump Motors and Drives

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

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

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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pumpspump curvesvariable speedaffinity lawsselection and specificationhydronic system design

Three-way and Two-way Control Valve Basics in Hydronic Systems

RL Deppmann January 29, 2024Controls, Pumps, Hydronic System Design, Selection and Specification, Curves, Control Valves, Valves, Monday Morning Minutes

Centrifugal pumps operate at the intersection of the pump curve and the system curve. Last week we developed the system curve for an example closed …

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pumpstwo way control valvehydronic system designcontrolsthree way control valve
closed system diagram
closed system diagram

Closed System Curves in HVAC Hydronic Systems

RL Deppmann January 22, 2024Hydronic System Design, Selection and Specification, Curves, Affinity Laws, Affinity Laws, Monday Morning Minutes, Pumps

  A system curve is a graphical representation of how a heating or cooling system flow rate and system head might change as the load …

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hydronic system designaffinity lawsclosed systemsclosed system curves

What’s On a Pump Curve?

RL Deppmann January 15, 2024Monday Morning Minutes, Pumps, Selection and Specification, Curves

  Selecting centrifugal pumps for heating, cooling, process, and plumbing systems is easy once you understand how they work and what you are seeing when …

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pump curvepumpspump selection

Centrifugal Pumps: How Do They Work?

RL Deppmann January 8, 2024Operation, Monday Morning Minutes, Pumps

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 …

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operationpumpscentrifugal pumps

Happy New Year from R. L. Deppmann

RL Deppmann January 1, 2024Monday Morning Minutes

The R. L. Deppmann team wishes you a Happy New Year! We look forward to continuing to serve you in 2024. We will be back …

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happy new yearRL Deppmann

R. L. Deppmann Wishes You a Happy Holidays

RL Deppmann December 25, 2023Monday Morning Minutes

R. L. Deppmann wishes you and yours a Happy Holidays! We wish you all the best this holiday season.

RL Deppmannhappy holidays
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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