Procedure for inspecting systems to troubleshoot problems.
Part 2 of Jim Elsey's column: The System Is the Boss.
Jim Elsey discusses two main factors that make up a system curve for a single centrifugal pump in an open system with a flooded suction.
It is important to know when a slow-speed pump may be a better option.
A common misconception is that it is due solely to material strength.
Avoid this unique and specific type of cavitation caused by the impeller passing too close to the cutwater(s) on a volute-style pump.
The placement of the cutwater, its length, thickness, leading edge profile and flow angle all have roles in the casing efficiency.
The impeller and casing must be matched to each other or the results will be a disaster.
In part two of this two part series, Jim Elsey discusses potential issues with variable frequency drives.
Jim Elsey discusses the pros and cons of VFDs and VSDs.