Jim Elsey August 2019
"Wishin’ and Hopin’”—both Dionne Warwick and Dusty Springfield had hit versions of this pop song in the early ’60s. The lyrical message is that you will not get want you want if you just sit around wishing and hoping; instead you need to take action to achieve the desired outcome.
Jim Elsey July 2019
In last month’s column (June 2019), I shared my concept of what constituted a “pump twilight zone,” and I offered five mystery examples. The preliminary reader reaction was good, so this month I am adding four more examples. 1. The case of the hidden factor
Lev Nelik July 2019
In this issue of Pumping Prescriptions, I will answer a common question I receive from readers related to system curves for boiler feed systems.
Jim Elsey June 2019
People of a certain age, and those that enjoy TV reruns, may remember the show called “The Twilight Zone.” In each episode, there was always a surprise plot twist and a subsequent moral or lesson at the end.
Jim Elsey May 2019
The old joke about falling from a tall building is that “it isn’t the fall that kills you, it is the sudden stop at the bottom.” When it comes to cavitation, it is not the formation of the vapor bubbles that kills the pump, it is the subsequent collapse.
Dr. Nelik May 2019
This reader’s response to Dr. Nelik is from Global Pump Engineering Manager Ben Lindstrom
Jim Elsey April 2019
Last month, I discussed why a pump should be aligned nine times and declared that four of those alignment adjustments should be made before the pump is started up.
Jim Elsey March 2019
I have been involved with horses for most of my life.
Lev Nelik March 2019
I received good feedback from the readers on my January 2019 P&S article “Calculating vs. Estimating Pipe Velocity.” Below are some of the letters and my responses.
Jim Elsey February 2019
“If the only tool you have is a hammer, everything starts to look like a nail”… paraphrased from Dr. Abraham Maslow (“Psychology of Science,” 1966). This famous axiom is also referred to as the law of the instrument.
Jim Elsey January 2019
System designers frequently place strainers on the suction side of a pump.
Jeff Sines January 2019
Editor’s Note: Jeff Sines is a member of Ray Hardee’s team at Engineered Software Inc. This month, he is a guest columnist in Hardee’s place.
Lev Nelik January 2019
During our last Pump School session, one attendee asked how much error there would be if the velocity head and gauge elevation correction were not accounted for.
Jeff Sines December 2018
Editor’s Note: Jeff Sines is a member of Ray Hardee’s team at Engineered Software, Inc.
Jim Elsey December 2018
My last five articles covered the calculation of net positive suction head available (NPSHa).