Not All ANSI Pumps Are Created Equal
OEM pumps and parts outperform replicated products, and can save thousands per year in operating costs. Industrial process managers who purchase and maintain pumps are familiar with a marketing...
NPSH: A Characteristic of All Pumps
Note from Terry Henshaw:This is the first in a year‑long series of articles called Understanding NPSH. These articles were originally prepared as class notes for the all‑day seminar on NPSH...
Vast tonnages of oil sands are now being transported as slurries in centrifugal slurry pumps as the first stage of the bitumen extraction process. Similarly sized pumps are also used to transport the...
Oil Sands Pump Performance Testing and Limitations
Many millions are spent in the oil sands industry providing new plants for the production of oil from tar sands. Oil sands pumps are a key component in these expansions.The cost of non-conformance can...
How CFD simulation provides one pump manufacturer with a virtual test facility.Our chopper pump is a centrifugal pump that utilizes a chopping action between the impeller and suction plate. These...
Packaged Pumping Applications and Best Practices
Packaged pumping systems are gaining in popularity due to benefits including ease of installation, single source responsibility and streamlined manufacturing. Packaged systems simplify the...
The City of Hammond, Ind., recently received a large prefabricated housed booster system that will increase flow capacity for nearby residents by pressurizing the potable water from Lake Michigan.Two...
Parallel Pumping (Part One): Parallel and Not So Parallel
Suppose, for a moment, that you are lounging on a beach somewhere in the vicinity of the equator.  If you were to draw side by side two lines in the sand, both heading due north, they will appear...
Last month we explored the effect of the system curve on the output of two identical centrifugal pumps operating in parallel. This month we will review several other factors that can also impact their...
Performance Curves and NPSH Tests
Editor's Note: This is the fourth article the year-long series, Understanding NPSH. To read the previous article, click here. To read the next article, click here.NPSHR Shown as a Single...
Cavitation is defined as the phenomenon of formation and consequent implosion of vapor bubbles in a region where the pressure of the liquid falls below its vapor pressure. Cavitation can occur in any...
Proactive Bearing Maintenance
An unexpected bearing failure needs to be understood and seen as an opportunity for improvements.Centrifugal process pumps are workhorses of pulp and paper, oil and gas, chemical and other industries....
Most industrial centrifugal pumps carry a significant capital equipment value. Maintaining them to run close to their best efficiency point (BEP) saves in downtime, repair costs, and overall power...
InnovationIntroduced February 6, 2008, the patent pending Goulds 3196 i-FRAME uses ITT proprietary software to perform continuous temperature and vibration monitoring and alert end users via light...
A recent call to troubleshoot a horizontally-split multistage pump reminded me of my good old days working for an OEM. When an OEM de-stages a standard design, an important engineering step is...
Dear Readers: In the next three issues, we will present three Pump Puzzles  to solve. The first one-an impeller cut problem-is an application of the Affinity Laws to reduce the motor amps and...
Pump Performance Monitoring
A Comparison Between Conventional and Thermodynamic MethodsEnergy conservation is the need of the hour. Pumps are found in abundance in almost every industry and utility. Of them, the most common are...
Pumps and pump systems are unique, engineered products that require specialized knowledge in all phases of repair, rebuilding and balancing. When pumps fail, costs add up quickly for repairs,...
Click Here for Solution to Pump Challenge #5 I want to know any useful information regarding annual surveys for pumps. What are their advantages and how useful are they?Ahmed SobhiSales Manager,...
Pump Vibration Monitoring Basics
Knowing the application's demands and the sensor's capabilities is critical for accelerometer selection.Vibration monitoring of critical and auxiliary pumping systems helps improve machine...
PumpCalcs: Be the Pump Designer
I have seen, and I am sure you have too, countless examples of installed pumps that are poor hydraulic fits. These selection mistakes are called off-design pump selections, bad actors, misapplied...
An Arizona mining company and an engineering pump system expert share a mutual understanding of what is needed to improve the electrowinning process that drives the copper mine's operations.Our...
The U.S. Navy pumps brine for distillation units, transfers sewage from CHT tanks and pumps wastewater for shipyards. Conventional pumping technology, however, was requiring high levels of...
As the cost and supply of fuel continues along its bumpy road, more emphasis has been placed on tapping into the remainder of the world's oil reserves. Canada is home to one of the world's two largest...
We were told that the 48-in diameter sewage pump impeller from one of New York City's main sewage pumps had been found "practically destroyed." When the impeller actually arrived at our location, both...
Pumps & Systems, April 2007Once upon a time, in power plant fuel oil transfer and injection services, it was difficult to justify replacing twin screw timed pumps when maintenance was already...
Have you ever experienced this? The pump that you purchased for one specific performance is placed in service and operates at another point that is completely different from its original design point...
In today's tough economy, many companies  face unprecedented challenges that are forcing them to scale back and rethink their approach to managing business. During financially challenging times,...
People often look at renting versus buying in the sense of how much it will cost. If it is a long-term project, it is possible and probable that rental fees will surpass the price of buying the pump....
Repairing multistage pumps has its own nuances and challenges. While compromising quality on single stage smaller pumps is never a good idea, a careful and methodical approach to multistage pump...