There are many indications that end users should not use a valve for flow control—or at least not to extremes.
Recently, I received a call from a plant operator in Ohio. He said, “We have a big contract from a customer to supply multiple oil heating systems and have just completed the first unit. It is ready...
First of Two Parts Cavitation can severely damage pumps and is affected by pump design and system issues. What affects it most? Does the suction behavior from the discharge side (system) of a pump...
Summer Pump Quiz—Cavitation
Let’s start with the basics: boiling is the vaporization of liquid. In a kitchen, water boils at high temperature—100 C (212 F). These temperatures are at atmospheric pressure, however.Liquid can...
Summer Pump Quiz—Solutions
Last of Two Parts
Thermal Stress Affects Pipe Forces on Pumps
Temperature changes can push pipe force beyond safe limitsTo view all of the articles in the Thermal Stress Affects Pipe Forces on Pump series, click here.Two major headaches for pump plant...
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...
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...
These days, the importance of a fresh water supply and safely-treated wastewater return to the river cannot be overemphasized. No matter how hard we try, we are still a long way from the most...
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...