Larger centrifugal pumps with horsepower over five are a great place to save energy in HVAC and plumbing systems. Historically, these larger pumps were typically …
Smart Variable Speed Centrifugal Pumps: Part 1 (Line Mounted)
This week and next we will talk about centrifugal pumps with the variable speed technology built into them. These pumps are called “Smart pumps.” Why …
How to Pick an HVAC Centrifugal Pump Part 9: Over Speeding HVAC Pumps & Motors
There are times when a little more capacity or a little more safety factor is needed from a pump selection. Often, we are asked about …
Centrifugal Pumps: Determining Flow Rate Using Amp Readings
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 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 …