The last two weeks we used the Pump Affinity Laws and the Xylem Bell and Gossett System Syzer® to either trim the impeller or reduce …
The Bell and Gossett System Syzer and Pump Affinity Laws – to resolve a field problem (Part 2)
Last week we used the Pump Affinity Laws to determine what size the impeller would be trimmed to in an oversized pump. Reducing the speed …
The Bell and Gossett System Syzer and Pump Affinity Laws – to resolve a field problem
The Pump Affinity Laws are used to determine the system curve. If we know the point of operation on a pump curve, we can determine …
The Bell and Gossett System Syzer and Pump Affinity Laws
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 …
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, …
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. …
5 Effective Cooling Tower Treatment and Monitoring Strategies
In this fourth and final installment of our series on In August 2025, Essential Water Quality Management to Safeguard Health and Infrastructure, we will explore …
Protecting Your HVAC Operating Equipment Assets Requires Proper Water Quality Management
In this third installment of our series on Essential Water Quality Management to Safeguard Health and Infrastructure, we will discuss the importance of water …