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 …
Permanent Magnet (PMAC) Motors & Electronically Commutated (ECM) Motors in Hydronic Systems (Part 1)
Hydronic system pumps and other HVAC and plumbing equipment will often have a variety of motor choices to specify. One of the newer additions to …
How to Pick an HVAC Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors
There are times when slightly more capacity or a little more safety factor is needed from a pump selection. Often times we are asked about …
How to Pick an HVAC Centrifugal Pump Part 8: Motors for HVAC Centrifugal Pumps
Motor speed for HVAC centrifugal pumps is a hot topic these days. Last week, the R. L. Deppmann Monday Morning Minute began exploring motors and …
How to Pick an HVAC Centrifugal Pump Part 8: Motors for HVAC Centrifugal Pumps
When selecting HVAC centrifugal pumps, the RPM or speed of the motor is an important choice engineers and designers make regularly. The default speed is …
Bell & Gossett Part Load Efficiency Value Part 3: HVAC Pump Selection
In the last two Monday Morning Minutes, we introduced the PLEV, or Part Load Efficiency Value, from Bell and Gossett. When we use part load …
Motor Specifications for HVAC & Plumbing Building Trades
Printer Friendly (PDF) The most frequently asked question is “How do I specify the right motor for variable speed applications”? Let’s start by referring to …
Motor Specifications for HVAC & Plumbing Building Trades
Printer Friendly (PDF) Thought I’d take break from the Sump and Sewage pump subject of the last few weeks and spend a little time talking …