Ray Hardee December 2019
When many of us problem-solve, often we focus too closely on the issue as presented, or we try to optimize the performance of a particular pumping system as it is designed in an ideal state.
Jim Elsey December 2019
Editor’s Note: This is a continuation of Jim Elsey’s column from the November 2019 issue of Pumps & Systems titled “Wanted: Great Pump Salespeople.”
Ray Hardee November 2019
The expression “less is more” usually does not ring true in our field. Yet, as we search for more throughput, capacity and efficiency, adding more pumps or new and more powerful pumps is not always the answer.
Lev Nelik November 2019
There are two fundamental issues with pumps operating not at, or near to, best efficiency point (BEP): low reliability (things just break), as well as excessive energy consumption (somebody pays much more).
Jim Elsey November 2019
Talking “off the record” with plant owners and maintenance managers, they will often tell me that good pump salespeople are a rare find.
Jim Elsey October 2019
With a whimsical nod to the “Game of Thrones” fans out there, winter is coming soon, and this October title was chosen for two reasons. One is a simple reminder to those of us that have yet forsaken proper freeze protection for pumps, pipes and other components in our systems.
Jim Elsey September 2019
Here I go again, writing about net positive suction head (NPSH).
Ray Hardee September 2019
Piping systems are widely used in our industrialized economy to manufacture products and provide services needed to make the products. Several disciplines—technical and financial—work together to determine how these systems impact the profitability of a facility.
Heinz P. Bloch September 2019
Today, some of the world’s most profitable oil refineries use pure oil mist on thousands of rolling element bearings. Pure mist is often considered the “gold standard” and has been in successful use at refineries owned by ExxonMobil, Chevron, Shell and others for more than 40 years. Forty years of experience in solid, safe, reliable hot service with temperatures as high as 400 C validate their value.
Lev Nelik September 2019
Hi, Dr. Nelik, Your latest article in Pumps & Systems magazine, “Determining Static Component of System Curves in Tricky Situations,” (July 2019, read it here) was an intriguing read.
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.