Public works officials who manage the nation's wastewater treatment plants (WWTPs) would universally agree that a "weak" link in any plant's process chain can cause big-and often expensive-problems....
Last month we learned that the power required by a centrifugal pump is directly proportional to the specific gravity (SG) of the pumped liquid. We also learned that as long as the liquid has a...
By lifting wastewater to a higher elevation, pump stations are installed either in the gravity system or at the headworks of the wastewater treatment plant. Areas not suitable for gravity systems may...
Recently I was involved in a discussion with some folks from Chevron about the effects of viscosity on centrifugal pump performance. Here are some excerpts from our discussion: "The Hydraulic...
This study establishes the relevant characteristics of sludge and how they affect the performance of pumps with a swept-back leading edge impeller and relief groove in the volute and head losses in...
Transporting large pre-fabricated modules to a remote, hostile and storm-ravaged environment is difficult and not without risk. For this reason, centrifugal pumps were chosen to play a key role in...
3-D laser scanning is a relatively new technology that yields a three dimensional virtual record of a real object. The concept is simple and similar to police radar, but requires the power of modern...
In the late 90s, I used Excel to develop a simple graphical system that showed the variable speed performance of a pump based upon its published 60-hz H/Q curve. I have modified it to model several...
Proper installation and adjustment can make the difference between the success and failure of a packed pump. By keeping in mind the fine points of a few key principles, the chances of success are...
Consider a typical sewage collection system. At the initial point of discharge, water first flows (by gravity) into a network of (sloped down) drain pipes, which gradually intercept a larger main...
Born in the 3rd century BC, pumps are one of the most important mechanical devices in all industrial applications. Sustaining their importance in a mature market characterized by steady growth and...
Some may question if this is an appropriate topic for a pump magazine. While I do admit that I am a staunch conservative, this column is not about the political left. Instead, it addresses a very...