Pump System Design
First of Two Parts
On-Line Vibration Analysis Versus Vibration Trending
Vibration monitoring can be an early warning of problems developing inside rotating machinery. As companies migrate from a passive run-to-failure approach to a proactive/preventive maintenance method,...
The standards for repair will begin with a standard for vertical turbine pumps.The pump industry is undergoing renewed interest in the technical aspects and quality of repairs. Pump users’...
Wastewater Debris Disposal Options
Strange things can enter municipal wastewater processing plants. While the bulk of the volume is water, the main challenge is what is carried along with it. As the influent enters the plant, the first...
10 Steps for Proper Pump-Pipe Alignment
The initial version of this procedure was published several years ago by me. Since then, a large amount of feedback has been accumulated. The most recent reflection appeared in the March 2012 issue of...
Shaft Straightening Methods and Procedures
First of Two PartsStrengthening of bent shafts is a tricky and controversial process. A bent shaft can cause many pump problems—including wear of supporting bushings, leaky seals, high vibrations,...
Repair Standard for Vertical Pumps
Since the original publication of this draft standard in the January 2008 issue of Pumps & Systems, I have received feedback, encouragement, numerous questions and criticism. The draft listed...
Handling Downtime
While scheduled downtime is different from unscheduled, both can take away from a company. An effective reliability program, however, will minimize unplanned downtime and maximize scheduled...
Use Simple Pump Troubleshooting Methods Before Rushing to Fancy Analysis
When the motor amps are kicking a unit offline, the first question is whether the motor or the pump is the problem. Before any sophisticated troubleshooting methods are applied, most experienced...
Specialty Materials Help Improve Pump Reliability and Save Energy
Efficiency degradation in pumps can be related to three areas. Worn clearances between the wear rings of the impeller and the casing can increase leakage and drop the volumetric efficiency of the...
This column presents a discussion between myself and pump users regarding some of their questions, concerns and preferences about materials of construction that they consider for their applications....