Hydronic heating system flow rates and pressure drops are related through a series of AFFINITY LAWS. Let’s examine the laws and how to use them …
Happy New Year from R.L. Deppmann
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 …
Wishing You a Happy Holidays from R.L. Deppmann
We wish you a holiday season filled with joy and cheer. Happy Holidays from all of us at R.L. Deppmann!
Matching the Steam Trap to the Control Valve Type (Part 3): Lifting Out of Traps
R.L. Deppmann gets lots of heating system troubleshooting calls. Over 1/3 of the calls we get about coil and heat exchanger problems end up being …
Match the Steam Trap to the Control Valve Type (Part 2): Types of Traps
Which style of steam trap should I use when I have a modulating control valve? What happens if I “lift” out of a steam trap? …
Match the Steam Trap to the Control Valve Type (Part 1)
Steam heating systems are a dying breed in commercial and institutional heating systems. Engineers and contractors understand a great deal about hydronic heating systems. Sometimes, …
Happy Thanksgiving from R.L. Deppmann!
Thank you to our valued customers and industry partners for working with the R. L. Deppmann Company in Michigan and Northern Ohio! We will be …
Variable Frequency Drives (VFD) and Single-Phase Power
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 only …
How to Limit the Speed of the Pump Using a Danfoss Variable Frequency Drive
In this Monday Morning Minute, we demonstrate how to limit the speed of the pump using the Danfoss Variable Frequency Drive (VFD).
Adjusting a Variable Frequency Drive (VFD) to Over Speed a HVAC Centrifugal Pump
In past R. L. Deppmann Monday Morning Minutes, we discussed the option of a small amount of over speeding on B&G pumps in HVAC applications. …