Characteristics of Centrifugal Pumps
Head, performance curve and affinity laws all contribute to the efficiency of centrifugal pumps.
Open-Delta Systems Affect Variable Frequency Drives
To avoid premature drive failure, proper precautions must be taken when installing VFDs on open-delta supplies.
Plant Upgrades Improve Efficiency at Midwest Refinery
Equipment and technology improvements can be sound investments.
Stainless Steel Motors
In the food industry, stainless steel performs more productively and efficiently.
Top-of-Motor Vibration
A simple mathematical model can be used to estimate vibration at the top of the motor in a vertical pump-motor structure.
The Bernoulli Principle
Read Part OneRead History of Pumps seriesThe Bernoulli Principle explains the flow of fluids and was one of the earliest examples of conservation of energy. It states that during steady flow, the...
Dry Gas Seal Conditioning Systems
Ensure proper gas flow and determine gas quality required for reliable operation.
A Tennessee community review shows increasingly positive operation and maintenance statistics.
Grinder/Cutter/Shredder Pump Resolves Sewage Clogs
New cleaning and personal disposable wipes can cause major pumping problems.
There is a saying that “You don’t know what you’ve got until it’s gone.” This concept can be all too familiar for anyone who has ever neglected a pump. A dependable pump is not truly...
Part 1 (Pumps & Systems, August 2012) discussed an example in which neglecting corrections for velocity head and gauge elevation did not introduce significant errors in the calculations. Part 2...
New Progressive Cavity Pump Technology
Progressive cavity (PC) pumps are commonly referred to in industry as mono-pumps, screw pumps, eccentric screw pumps or worm pumps. All are positive displacement pumps. The inventor of the progressive...