Understanding this complex topic can help end users avoid common pitfalls.
System design and instrumentation decisions can impact the efficiency and maintenance requirements of these pumps in wastewater applications.
Because cavitation is unavoidable in pump operations, understanding how to reduce it using NPSH calculations is necessary to maintain pump functionality and health.
Pressure gauges are inexpensive components that can predict the causes of poor reliability in centrifugal pumps and prevent costly repairs and downtime.
One of the supposed advantages of centrifugal pumps when compared to positive displacement pumps is their ability to operate across a wide flow range. Because a centrifugal pump operates at the...
This is the first article in a four-part series. Four part 2, click here. Second only to electric motors, centrifugal pumps are usually the simplest machines in a typical process plant. Pumps...
This pump type's unique system design requirements are often ignored or misapplied, which affects reliability and operation.
Pump sensors can improve system operation and detect dangerous faults.
HI Pump FAQs is produced by the Hydraulic Institute as a service to pump users, contractors, distributors, reps and OEMs.
This four-part series explains the reasons behind repeat pump failures and uses a real-world field example involving boiler feedwater pumps.
My last two columns (Pumps & Systems, April and May 2014) explained how pump suction behavior depends on how suction pressure is reduced. The original video, which showed two suction pressure tests,...
Q. What is NPSH3, and how does it relate to the NPSHR for a rotodynamic pump? A. The Hydraulic Institute defines the required net positive suction head (NPSHR) of a pump as the net positive suction...
After reading two of my articles on power pump valves, valve springs and net positive suction head required (NPSHR), Brazilian engineer Ricardo Martuscelli emailed me to suggest that I create graphs...
With the exception of hard-core pump enthusiasts, most pump users do not have much interest in or the need to get deep into pump design. What makes a five-blade impeller operate differently than a...
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...