Take a quiz to test your pump knowledge. If you like learning about pumps, Cornell Pump School 2017 is less than three months away! You’ll be exposed to information in this quiz and much more at the training program more than 12,000 pump professionals have taken since 1949. Held in beautiful Portland, Oregon, the school offers two days of instruction and hand-on training. Find out more about Pump School 2017.
Ken in our assembly shop dressed up today in his 90’s vintage Cornell attire. Even on the last day of the month when the shop guys are working hard to get promised orders out, they know how to have fun!
Cornell Pump was honored to give a refrigeration maintenance presentation to the Refrigeration Engineers and Technicians Association (RETA) chapter in the Tri Cities (Washington). Cornell Application engineer and an assembler went over the proper maintenance for our open (CB) series and hermetic (Arctic King) series.
If you’d like to attend a great classroom and hands on event, where you learn like the RETA chapter, consider Pump School 2017. Two days of great instruction that will benefit new and experience pump operators alike.
Ever wonder how a piece of metal gets turned into a precision Cornell Pump shaft? This video vignette shown on our Pump School tours, gives a glimpse of how the shafts are made. If you attend Pump School 2017 you can see the shaft cell, assembly area, paint booth, test lab, and much more on the factory tour, plus get 1.5 days of engaging classroom instruction. Pump School 2017 is set for January 24 and 25, 2017 . Learn more about Pump School.
There are four basic types of pump curve shapes that you will usually find for centrifugal pumps:
Gradually rising – the most common type
Steep – probably the second most common type
Let’s talk about the pros and cons of each of these.
If you start on the right side (maximum capacity) of a gradually rising pump curve, you will have a nice arched shape, and head (pressure) increases continually as capacity is decreased, and you move to zero flow.This pump will provide a medium change of head (pressure) as the flow increases or decreases, and pump operation is very “stable” as the flow and head relationship are well defined throughout the pump curve. This type of performance is usually preferred, as it usually is very compatible to most sensing/control accessories that may be used to control the pump.
With a steep centrifugal pump curve, you will have a steeper arch, resulting in a larger head (pressure) increase as the flow decreases, compared to the gradually rising curve mentioned above. This performance may be desired with some sensing/control equipment where a larger pressure differential is preferred, and with system requirements that have large pressure demands with fairly small flow changes. The stability of this curve is excellent due to the steeper continuously rising shape.
An operator may prefer a fairly flat pump curve in some systems, where he/she would like very little pressure increase as the pump flow decreases. In addition, the operator/designer would not need to be concerned about building large pressure levels as the flow varied, and could possibly use lower pressure rated piping and accessories. The pump stability of this curve is good.
The fourth pump curve type is a drooping curve. As shown in the illustration, this curve shape is not stable in the area where there are two flows where the head (pressure) can be the same, in the low flow portion of the pump curve. This pump should be operated in flow ranges beyond (higher) than the area of instability in order for it to operate smoothly and efficiently. This pump would operate with a narrower acceptable flow range for that reason.
If you have any questions regarding proper selection of your Cornell Pump, please contact any one of our technical salesmen for assistance.
Eric Rice of Industrial Refrigeration Services in Visalia, CA is the proud winner of Cornell Pump’s Kindle Fire Raffle at RETA 2016. Congratulations Eric! If you didn’t happen to attend RETA this year, you can still learn about Cornell Pump’s Arctic King series.
Prominently featured at the show, the Arctic King offers operation at 1,200/1800 RPM –at least half the speed of other hermetic refrigeration pumps. This allows for better NPSHr, less required refrigerant, and longer bearing life. And the Arctic King is flange-to-flange replaceable with Cornell’s long lived and popular CB open drive series. Learn more about the Arctic King.
CENTEX Africa had a contingent of pump professionals in for a Pump School the last couple days. Classroom presentations from Cornell Pumps PE certified engineers, as well as knowledgeable sales staff, was augmented by hands on learning in the factory.
Cornell Pump is getting ready for Pump School 2017 in January. You can learn about pump hydraulics, efficiencies, terminology, and more—and get great practical learning. At $99* for the two day seminar it’s a steal. Learn more here.
Cornell Pump Company is showcasing its latest refinements in refrigeration pump technology this week at the RETA conference in Las Vegas. Among the highlights are a new, multi-stage hermetic pump model with built-in bearing monitoring that can operate as low as 10 GPM with no cavitation. Come down to the show and greet the crew!