The 77 pumps at the Puralube Zeitz site leverage progressing cavity and centrifugal pumps to recycle used oil into more than 140,000 metric tons of base and mineral oil products.
First of Two Parts
Centrifugal pumps are commonly used for most liquid pumping services. For viscous liquids, positive displacement pumps often perform better. However, many engineers specify...
This is the first article in a four-part series. Four part 2, click here.
Second only to electric motors, centrifugal pumps are usually the simplest machines in a typical process plant. Pumps...
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...
Today’s federal requirements dictate the minimum efficiency of an electric motor, but they do not have any impact on the efficiency of a centrifugal pump. A 10-horsepower, 1,800-rpm motor must meet...
Last year, a Pumps & Systems reader asked about matching variable frequency drives (VFDs) and motors.
“I have a spare pump in my warehouse that requires 15 horsepower (HP) at best efficiency...
This article is the first of three on centrifugal pump radial thrust. It relates the author’s experience with the use of the traditional equation to calculate radial thrust, subsequent measurements...
Editor's Note: This is the fifth in a six-part series on centrifugal pump efficiency. For other articles in this series, click here.Curve ShapeIn Part 2, I showed the effect of specific speed (Ns) on...
Predict efficiency using the Hydraulic Institute’s standards as guidelines.Energy conscious centrifugal pump users are always interested in knowing the value of maximum attainable pump efficiency...
Editor's Note: This is the first in a six-part series on centrifugal pump efficiency. For other articles in this series, click here.In this multi-part series, we will investigate several aspects of...
JDA Global LLC announced the release of its SAMBA™ Sanitary Centrifugal Pump, ideal for pharmaceutical, food & beverage applications which call for 3A design standards & clean-in-place...
Q. When pumping a liquid that has a viscosity greater than water, how can the effect of this higher viscosity on the pump performance be estimated?A. The Hydraulic Institute (HI) has...
Q. For centrifugal pump impellers, what is momentum change, and what is its significance?A. In single suction impellers the axial force related to the momentum of the incoming fluid should be...
ChemTreat, Inc., boosts manufacturing efficiency and improves customer service.At some point in the development of most businesses, through hard work and a commitment to customer satisfaction, growth...
In March 1980, I attended the ASME symposium on Predicting the Performance of Centrifugal Pumps and Compressors in New Orleans. I was about three rows from the podium, sitting next to a fellow who...
