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Variable Frequency Drives (VFD) and Single-Phase Power

Norm Hall February 20, 2023 Monday Morning Minutes, Pumps, Variable Frequency Drives, Variable Speed

As a representative for Danfoss VLT variable frequency drives (VFD), we often are asked about the use of the VFD when single-phase power is the …

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danfossPumpssingle-phase powervariable frequency drive

Centrifugal Pumps: Determining Flow Rate Using Amp Readings

Norm Hall January 23, 2023 Commissioning and Balance, Commissioning and Balance, Monday Morning Minutes, Motors, Pumps, Pumps

We understand that the best way to determine the flow rate of an operating pump is the proper readout of gauges attached to the pump …

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amp readingscentrifugal pumpsflow ratePumps

Hydronic Systems Pump Minimum Flow Methods

Norm Hall January 16, 2023 Control, Minimum Flow, Monday Morning Minutes, Pumps

Minimum pump flow rate is critical to the trouble-free operation and longevity of the centrifugal pump. In the last blog we described the use of …

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Bell and Gossetthydronic systemHydronicsNorm HallPumps

Pump Minimum Flow Using a Cla-Val Back Pressure Valve

Norm Hall January 9, 2023 Control, Minimum Flow, Monday Morning Minutes, Pressure Regulating, Pumps, Valves

Minimum pump flow rate is critical to the trouble-free operation and longevity of the centrifugal pump. The pressure sustaining valve or back pressure valve is …

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Bell and GossettHydronicsNorm HallPumps

Pumping From an Atmospheric Tank: Pump and Tank Control (Part 3)

Norm Hall January 2, 2023 Control, Monday Morning Minutes, Pumps, Variable Speed

Let me start by wishing everyone a Happy and Prosperous New Year. This blog begins the 14th year of the R. L. Deppmann Monday Morning …

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Norm HallPipingPumpsTanksvariable speed
lightbulb
lightbulb

Carbon Reduction is the Dream. Here’s How to Make it a Good One.

Norm Hall May 23, 2022 Decarbonization, Decarbonzation, Hydronic Design, Plumbing System Design

Carbon reduction in building design is critical to the lifestyle of our future generations. Most engineers and their owner clients understand the concerns and welcome …

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decarbonizationhydronic systemsHydronicsNorm HallPumps

Primary-Secondary Variable Heating Systems: Should I Pump Into the Boiler or away from It?

Norm Hall April 25, 2022 Boilers, Hydronic Design, Monday Morning Minutes, Primary Secondary Piping, Primary Variable

Previously, the R. L. Deppmann Monday Morning Minutes looked at pump location in a primary-variable boiler heating system. We made a very definitive statement about …

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Boilershydronic systemsHydronicsprimary-secondary pipingPumpsvariable speed

Minimum Flow in a Variable Speed Pump: A Great Example

Norm Hall March 14, 2022 Cooling Towers, Hydronic Design, Monday Morning Minutes, Pumps

What is the minimum flow rate a variable speed pump can provide without damage to the pump? This is a question every engineer should ask …

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Cooling Towershydronic systemsHydronicsNorm HallPumps
aegis w swing tank
aegis w swing tank

Heat Pump Water Heaters – Will They Save the World?

Norm Hall March 7, 2022 Electric, Gas Fired, Monday Morning Minutes, Pool Heaters, Pumps, Water Heaters

Decarbonization and Electrification are two terms which may bring both fear and hope to plumbing engineers and gas fired water heater manufacturers. The hope is …

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LyncNorm HallPumpsTanksWater Heaters
indoor swimming pool
indoor swimming pool

B&G Pumps in Chlorinated Swimming Pool Applications

Norm Hall December 6, 2021 Monday Morning Minutes

We often get questions about using Bell & Gossett pumps in institutional and commercial chlorinated water swimming pool applications. Here are a few suggestions about …

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Providing quality products and outstanding service to customers in Northern Ohio & Michigan since 1927.
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  • Products
    • Overview
    • Pumps and Accessories
    • Boilers and Water Heaters
    • Hydronic Systems
    • Plumbing Systems
    • Steam and Condensate
    • Variable Frequency Drives (VFDs)
    • Glycol Installation
    • Snowmelt Designs
  • System Design
    • Overview
    • Project Gallery
    • Selection and Design Tools
  • Contractors
  • Service & Parts
    • Overview
    • Startup and Warranty
    • Parts
    • Service and Maintenance
  • Education
    • Overview
    • Training Opportunities
    • Factory Classes
  • About RLD
    • Overview
    • Team Deppmann
    • R.L. Deppmann Locations
    • Careers
    • Community Engagement
    • Press and News