A Quick & Easy Solution
Water & Wastes Digest
August 2006
By Kevin P. Murphy
New technology drops valve installation time to less than one hour
Proper Pump Installation
WWDmag.com
January-December 2006
Joe James
One of the key factors in obtaining a reliable pump installation is the foundation. A properly and well-installed machine can provide years of trouble-free operation, whereas an insufficient job can create a costly maintenance nightmare and lead to otherwise unnecessary repairs.
Mile High Membranes
Water & Wastes Digest
November 2005
By Tim Gregorski
WWD talks with Bud Hart, water supply, treatment and quality manager at the Columbine (Colo.) Water Treatment Plant about the results of their membrane-related upgrades
What Is L3/D4 and Why Is It Good for the Seals If It Is Low?
Pump Source
April 2003
What is L3/D4 (L cubed over D to the fourth)? It is a measure of pump rotor stiffness, its ability to resist radial load and to minimize deflection. It comes from the basic cantilevered beam deflection formula, which you can find in any book on mechanics: y = F x L3 / (3 x E x I), where F is radial load, L is cantilevered length, E modulus is the elasticity of the material and I is moment of inertia.
The O-Zone: Today's Lesson: Ozone Installation
Water Quality Products
February 2003
Roger Nathanson
The installation of ozone equipment on well applications utilizes the same principles and techniques as chlorinators, air injection and softener systems. There are only minor variations in sequence, parts and details.
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Prefabricated Pumping Systems
Water Engineering & Management
February 2003
Tom Levey and Stephen Jeffus, P.E.
Some engineering firms still harbor the misconception that prefabricated systems are too small to handle the enormous volumes of water that municipalities and private water companies transport. Though once limited to certain-size projects, technological innovations and manufacturing breakthroughs have dramatically expanded the application of prefabricated pump systems over the past several years.
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Open Trench Failures Continue to Rise
Water Engineering & Management
March 2002
Del Williams
Despite the fact that hundreds of people are killed and severely injured in open-trenching accidents throughout the United States every year, most municipalities continue to award construction contracts to companies utilizing open-trench methods, when safer trenchless technology is available to them.
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Infrastructure Relocation for a Growing Urban Community: Juggling Schedules and Methods
Water Engineering & Management
March 2002
In the last decade, municipal leaders of medium-sized cities across the United States have rediscovered downtown urban centers. Economic development initiatives and long-term growth once again focus on these areas. As plans for revitalizing downtown neighborhoods begin to take shape, local governments are finding that existing infrastructures are inadequate to support the utility needs of incoming commercial and residential tenants. As a result, the need for infrastructure rehabilitation and utility service expansion is in high demand.
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