As a follow up on my AC Motors series, I thought it would be a good idea to provide a short overview of work, power and torque as it applies to the AC motor. I will provide a reference to a more in...
AC Motors Part Two-Three Phase Operation
Although a number of AC motor designs are used, the induction motor is, by far, the most common and will be the topic of this column. We will also focus on the three-phase design as it provides a more...
April-Wise Pump Quiz: NPSH and Developed Head
In this installment of “Pumping Prescriptions,” I have a quiz for our readers. A typical pump system is shown in Figure 1. A centrifugal pump delivers 200 gallons per minute of water from an open...
Asset Management Systems
Data and life cycle management technology helps refineries maintain equipment and reduce the total cost of ownership.Typically, 90 percent of the total life cycle cost (LCC) of a flow management...
Benefits of Wireless Monitoring
Wireless technology increases efficiency and safety in a chemical refinery.Using wireless technology for monitoring the measuring points in industrial plants has become an attractive choice for plant...
Editor's Note: The editors of Pumps & Systems were happy to spend some time with new FSA President Ed Marchese and FSA Technical Director Pete Petrunich to discuss FSA's role in standards...
In 1933, 36 American and Canadian companies attended the inaugural meeting of the Mechanical Packing Association in New York. After changing its name to the Fluid Sealing Association (FSA) in 1970,...
How Can Compression Packing Be Applied in Severe Service?
A discussion of current compression packing technology will help set the stage for an example of how this can be accomplished. Compression packing is still widely used to seal rotating equipment such...
Hydraulic Pump FAQs April 2011
Q.  When monitoring power consumption by a pump, what measurement methods are normally used and for what purpose?A.  Monitoring the power consumed by a pump can give advanced indication of...
When maintaining motors, proactive strategies are required.Whether the subject is motors, a maintenance department or an entire organization, typical maintenance methods are categorized as reactive,...
A refinery's vertical pump passes the test, verifying its performance before installation.The rotating equipment engineers at BP's Whiting Refinery in Indiana approached the support team at a pump...
Pump Protection
When can you trust your overload relay to keep you safe?The oil and gas industry depends heavily on pumps, and their reliability is vital for safety and economic reasons. For many years, the...
The Case for Engineered Seal Retrofits and Upgrades
Reengineered seals can be cost-effective and efficient alternatives to seal replacement.Among the major expenditures at an industrial facility, rotating equipment requires a significant capital outlay...
The Power of Wear Rings Part Two: Efficiency
With a 50 percent decrease in clearance, efficiency is increased by 2 to 4 percent.Part One of this series discussed how wear rings impact pump reliability by increasing rotor stability—reducing...
Sliding vane technology provides the suction needed to optimize product transfer for liquid-terminal operations.Many of us are familiar with the children's relay race that involves a bucket of water....
Unconventional Diagnostic Tool
Elastomer seal changes can be an indicator or potential pump problems.Modification of pump use can often lead to problems that can damage the pump over time, even though it may not be immediately...