How many times have you, as an engineer, looked at a number of pump curves and passed up a few because you did not like …
Water Heater Thermal Expansion Tank Sizing Safety Factors
In the last R. L. Deppmann Monday Morning Minutes we used the Bell & Gossett Systemwize selection program to size and select a water heater …
Point of No Pressure Change – Expansion Tank
The Point of No Pressure Change Demonstration video by Mike Belanger, a R.L. Deppmann Service Technician, is made up of two identical pumps, both of which have …
Thermal Expansion Tank Sizing: Bell & Gossett Systemwize
In the last R. L. Deppmann Monday Morning Minute we covered some thoughts on the use of code vs. non-code hot water expansion tanks. Why …
Thermal Expansion Tanks: When is the ASME Label Required?
One of the more frequent questions we are asked has to do with ASME label requirements for the thermal expansion tank on water heaters. When …
HVAC Hydronic Pumps: Impeller Trimming with a Drive (VFD)
In the last R. L. Deppmann Monday Morning Minute we covered the use of a B&G Triple Duty Valve to set the maximum speed in …
HVAC Hydronic Pumps: B&G Triple Duty Valve for Proportional Balance
The ASHRAE Standard 90.1-2013 and the State of Michigan 2015 Energy Code both require the trimming of impellers or reduction in the maximum speed when …
Updating Old Steam Systems with a Modern Boiler Feed Unit? Don’t Forget Return Lag Time.
This article was originally published by Steve Almgreen of the Bell & Gossett Steam Team. The Situation Here is a steam system with a recently …
Hydronic Pump Piping and Trim: Pump Suction Energy Levels
I frown a bit when reading about a product and the only place you find a key tip to avoiding problems is in the troubleshooting …
Hydronic Pump Piping and Trim: The Pump Suction
The piping at the suction side of the pump is the most important and, for some engineers and designers, the most misunderstood part of hydronic …