Columns and Blogs

Part 1 (Pumps & Systems, August 2012) discussed an example in which neglecting corrections for velocity head and gauge elevation did not introduce significant errors in the calculations.

Aug. 28, 2012 – With Hurricane Isaac reaching Category 1 strength today just after noon (CST) in the Gulf of Mexico, the nation prepares for its impact. The pump and oil and gas industries will be affected and have already taken precautions.

For a quick estimate of pump head in the field, the discharge pressure gauge is read.
Joe Evans
A discussion of the life and contributions of Daniel Bernoulli, who formulated the famous Bernoulli Principle.
Xylem continues ITT's water focus and continues to grow.
Terry Henshaw
Equation versus actual measurement of radial thrust in centrifugal pumps.
Keep pipes and pumps aligned to keep your pumps working longer.
Factors to consider when deciding the priority of pump efficiency.
From presses to collectors, there are several methods available for removing debris from wastewater.
Curve shapes reveal a pump's range of peak efficiency.

The late Charlie Jackson, vibration expert at Monsanto, once told me that he was unaware of any centrifugal pump manufacturer that knew how to calculate the hydraulic axial thrust produced within the liquid ends of their pumps.

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.
The performance of a centrifugal pump with a trimmed impeller will follow the affinity laws as long as that trim is relatively small.
If most of the attachment boundary were along the short edge of the plate, the natural frequency of resonance would be somewhat less than if the plate were attached mostly along the wide edge.

Early centrifugal pump design was heavily influenced by turbine technology during the mid to late 1800s.

How repair standards should be evolving
In this multi-part series, we will investigate several aspects of centrifugal pump efficiency. First of Five Parts
The McGraw-Hill scientific dictionary [5] states that a volute is "a spiral casing for a centrifugal pump... designed so that speed will be converted to pressure."
Specific speed is a concept developed for water turbines1 in 1915, which was later applied to centrifugal pumps (Stepanoff, 1948). Specific speed is a way to “normalize” the performance of these hydraulic machines.
Temperature changes can push pipe force beyond safe limits

Pages

Cahaba Media Group

See also:

Upstream Pumping

© Copyright Cahaba Media Group 2015. All Rights Reserved. Privacy Policy