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 …
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 …
Hydronic Pump Piping and Trim: Flexible Diffuser Fittings
Pump installations tend to require a great number of spool pieces to meet the Hydraulic Institute’s and the equipment manufacturers’ recommendations. Before we get into …
Hydronic Pump Piping and Trim: Suction Diffuser Fittings
Pump suction piping is one of the areas where problems of frequent repair or noise will originate. There is a lot of confusing information out …
Hydronic Pump Piping and Trim: Suction Side
The pump suction piping and specialties are somewhat simple but can be a cause of headaches if a few simple rules are forgotten. This week …
Hydronic Pump Piping and Trim: Check Valves
The R. L. Deppmann Monday Morning Minutes reviewed pipe sizing and flexible connectors over the past few weeks. Today we turn our attention to check valves …
Hydronic Pump Piping and Trim: Should I use a Stainless Steel Flexible Connector?
Last week, the R. L. Deppmann Monday Morning Minutes introduced reasons why flexible connectors are used on pumps. This week the subject is the stainless …