B & G ecocirc e3 with ECM Technology (Electronically Commutated Motor)

Norm HallMonday Morning Minutes, Pumps, ECM, Selection and Specification, Inline Pumps

Bell and Gossett’s ecocirc pumps were introduced over the last few weeks. We promised to explain how the ECM technology provides more efficiency than standard induction motors. Let’s talk about the difference between a standard induction motor vs. a permanent magnet motor. With an induction motor, stator windings are arranged around the rotor so that when they’re energized, they create a rotating magnetic field.

NEW PRODUCT: Energy Efficient Ecocirc 19-14 Auto & Vario Heat Circulators

Joe SmolinskiMonday Morning Minutes, Announcements, Pumps, ECM, Selection and Specification, Inline Pumps

We are very pleased to announce the addition of the new ecocirc 19-14 heating circulators to our line of energy efficient products. As with the rest of the ecocirc line, this new offering also utilizes Electronically Commutated/Permanent Magnet motors, which by design are more efficient than permanent split capacitor induction motors. This technology also offers more flexibility than standard motors allowing us to add features via software logic rather than hardware that would otherwise add cost.

Centrifugal Pump Selection Specifying Future Conditions

Norm HallSelection and Specification, Monday Morning Minutes, Pumps

In the last R. L. Deppmann Monday Morning Minutes, we suggested a specification that would allow a future impeller change as a means of adding some safety factor to the pump provided on your project. What happens if you want to select a pump with a present and future condition? Here is a good pump selection for a capacity of 2700 GPM at 100 foot head using a 100 HP 1750 RPM motor.

Pump Selection – Flat vs. Steep Curves

Norm HallMonday Morning Minutes, Pumps, Selection and Specification

An engineer in Michigan called about a large project with several pumps being selected in parallel for a plant chilled water system. He commented that the Bell and Gossett pump curves are flat vs. processing pumps which often times are steep. His question was, “Why are B&G curves so flat?” I’ve not heard this comment for many years. What did he mean? The term steep curve comes from the process industry. This old term refers to a large change in pump head with a small change in flow rate.

Large Centrifugal Inline Pump Installation

Norm HallMonday Morning Minutes, Pumps, Selection and Specification, Inline Pumps, Types

In our last Monday Morning Minute, we suggested using the Base Mounted Bell and Gossett series 1510 series end suction or VSX series double suction pumps when the design capacity requires over 10 HP. We do occasionally see our series 80 and series 80-SC inline pumps specified in applications up to 100 HP. Often the reason used for this application is limited floor space. Today let’s examine floor space required by these pumps.