How Grease-Lubricated Bearings Function   Pump Source April 2003
A shielded, grease-lubricated ball bearing can be compared to a centrifugal pump having the ball-and-cage assembly as its impeller and the annulus between the stationary shield and the rotating inner race as the eye of the pump. Shielded bearings are not sealed bearings.

Intermittent Seal Leak in LPG Pump   Pump Source April 2003   Sourav Kumar Chatterjee
The following case study describes a reliability problem with a Liquified Petroleum Gas (LPG) handling pump in a field and the way it was troubleshooted and fixed.

Heavy Duty Drainage Pumps Rescue Stormwater Flooded Quarry   Water & Wastes Digest February 2003
Pumping around the clock at 10,000 gpm, two 94hp submersible, portable dewatering pumps manufactured by Pumpex, Inc. of Somerville, N.J., drained turbulent, overflowing stormwater to save a limestone quarry from extensive equipment damages and potential profit loss caused by severe flooding.

Submersible and Trailer and Vertical Pumps Solve Stormwater Problems   Water & Wastes Digest July 2002
PROJECT DESCRIPTION: To transfer stormwater from a creek to an adjacent river during periods of high water during storms and spring thawing.

Metering Pump Technology   Water Quality Products March 2002   By Steven Ebersohl, Pulsafeeder, Inc.
Since the introduction of the metering pump, chemical feed for disinfection has been a primary application. As we move into the 21st Century, it again is time to review how we introduce chemicals such as sodium hypochlorite into our water systems. While the goal remains the same, changes in pump technology have been created to provide more accurate and consistent results. This article will discuss current metering pump technologies, proper pump sizing, installation and future enhancements.

Production of High Purity Water From Seawater   Water Quality Products March 2002   Contributed by Ted Prato, Erik Schoepke, Lance Etchison, Tom O’Brien, Brian Hernon and Kit Perry, I
The Diablo Canyon Power Plant at Avila Beach in California utilizes seawater for both cooling water and makeup water for steam generation. Ionics, Inc., Watertown, Mass., designed and built and now operates a complete water treatment system serving the high-purity water needs of this power plant. Over the past eight years, the seawater treatment section has demonstrated excellent long-term performance as a result of strong design, consistent maintenance and qualified operators.

Pump Changeout Stops Fouling, Saves Energy   Water Engineering & Management January 2002
The pumps at the Stony Brook Lift Station in Suffolk County, N.Y. used to clog so often that crews anticipated an event as part of their weekly routine.
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Editorial Emphasis: Valves   Water & Wastes Digest October 2001
New Spring-loaded Check Valve Reduces Valve Failure Risk

Problem Solver: Godwin Pump   Water & Wastes Digest September 2001
Innovative Pumping System Diverts 75 mgd Sewer Flow During Rehab Project In Puerto Rico

New Pumping System Helps Conserve Water, Energy for Utah Conservation District   Water & Wastes Digest July 2001
The Ogden, Utah, area sought more cost effective and energy efficient ways to optimize and conserve its natural resources.
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Using Variable Frequency Drives for Sewage Lift Stations   Water & Wastes Digest July 2001
High in the Pocono Mountains of Eastern Pennsylvania, the small town of Tobyhanna was in need of a high head, small flow sewage lift pump.
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Coatings Repair 20-year-old Pump, Save Replacement Costs   Water & Wastes Digest July 2001
When one of four circulating water pumps at the Potomac Electric Power Company (PEPCO) Chalk Point Generating Station began to leak, engineers began to worry.
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Pumping Up Big John   Water Quality Products April 2001   Metropolitan Industries
The John Hancock building, located on Chicago’s Magnificent Mile, needed to revamp its entire pumping and reservoir system without shutting off water to the building’s residents.
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Hollywood Stays Green Using Underground Water Tanks   Water Engineering & Management February 2001
When you literally cannot move mountains, you must figure out a way to work around them.

Updated Sewage System Gives Tourists a Lift   Water Engineering & Management September 2000   Cecil Coombs, P.E.
Sewage overflow caused by the influx of visitors during tourist season prompted one community to improve its collection and treatment system.

From Eyesore to State-of-the-Art Facility: Pump Station Transformation   Water Engineering & Management August 2000   Roger Frauenfelder, P.E.
What was formerly a contaminated auto wrecking yard that twice caught fire and was an eyesore to the local community is being transformed into a state-of-the-art pump station. This transformation not only resolves critical infrastructure needs but also is aesthetically pleasing.

Company Rehabs Trunk Sewer While Rerouting 12 mgd of Sewage Flow   Water Engineering & Management July 2000
Using a temporary sewage bypass pumping system and its nondisruptive pipe rehabilitation methods, Insituform Technologies, Inc., has rehabilitated a half-mile-long section of trunk sewer buried beneath a Tucson roadway.

Impact of New HI Standard on Pump Intake Design   Water Engineering & Management March 2000   Robert L. Sanks, Arnold Sdano, George E. Hecker and Jack Claxton

The Secret Is Out: The Advancement of Submersible Pumps   Water Engineering & Management February 2000   Perry Stephens, Jr., P.E.
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Pump Intake Design Eliminates Wastewater Bypassing at an Economical Price   Water Engineering & Management February 2000   Joseph D. Bishop, P.E.
Design features at the Influent Relief Pumping Station (IRPS) recently placed into service for the City of Chattanooga, Tennessee, have resulted in major construction cost savings.

New Ductile Iron Check Valve Stops Water Hammer In Louisiana Municipality   Water & Wastes Digest August 1999
After suffering years of water hammer problems and the resulting effect on maintenance personnel and equipment, the St. Charles Parish Municipality in Louisiana needed a product that would save them both time and money. Milliken Valve Company of Bethlehem, Pa., provided the answer.

New Thermoplastic Pump Models Increase Flow, Reduce Power Requirements   Water & Wastes Digest April 1999

Plant Solves Sludge Pumping Problems Using Disc Pumps   Water Engineering & Management March 1999

Selection Criteria for Wastewater Pumps Part 3   Water Engineering & Management November 1998   Bayard Bosserman, P.E. and Paul Behnke, P.E.
This article summarizes the criteria for selecting pumps for specific wastewater applications.
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Selection Criteria for Wastewater Pumps (Part 2)   Water Engineering & Management October 1998   Bayard Bosserman, P.E. and Paul Behnke, P.E.
The second part of this article compares the different types of pumping stations available to the wastewater industry.
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Selection Criteria for Wastewater Pumps   Water Engineering & Management September 1998   Bayard Bosserman, P.E. and Paul Behnke, P.E.
Part 1 of this article discusses the types of wastewater pumps available and the need for screens.
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Specialized Motor Controller Manages Pump Surges During Starting and Stopping Cycles   Water Engineering & Management May 1998   Walter Lukitsch, P.E.
Fluid hammer can damage water systems, but specialized motor controllers can reduce surges and prolong system life.

Pump Station Monitor Keeps Village of Kohler On Top of Collection System   Water & Wastes Digest April 1998

Sewage Lift Station Saves Energy Through Pump System Modifications   Water Engineering & Management February 1998

Motor Management Solves Water District's Pump Reliability Problem   Water Engineering & Management December 1997

Piston Pump Moves Water Sludge Over a Distance of 1000 Meters   Water Engineering & Management March 1997

Wastewater Facility Stands Up to California Floods   Water Engineering & Management August 1996   Ron Rogers
Record rainfalls tested the county-owned treatment facility and unmanned pump station in Napa Valley.

An Approach to the Control of Return Sludge Pumping   Water Engineering & Management February 1996   Christian G. Hoffman and Howard M. Wexler
The principle of ultrasonics is being used to provide continuous measurement of the sludge blanket depth.

Performance Factors and Installation Procedures for AWWA Butterfly Valves: Part II   Water Engineering & Management December 1995   Joseph W. Hoff, P.E., and Albert W. Libke, P.E.
Part II of this article gives guidelines on the installation of butterfly valves.

Residential Backflow Prevention Begins at User Connection   Water Engineering & Management November 1995   Wally Gross
Backflow prevention programs are now being made feasible for single family residences

Performance Factors and Installation Procedures for AWWA Butterfly Valves: Part I   Water Engineering & Management November 1995   Joseph W. Hoff, P.E., and Albert W. Libke, P.E.
Part I of this article discusses the factors that influence a butterfly valve's performance.

Tertiary-Treated Wastewater Irrigates Monterey Peninsula's Recreational Acreage   Water Engineering & Management July 1995   Ian Lisk
An Ambitious expansion and upgrade project allows wastewater to be used for irrigation and saves large quantities of potable water.

Fast Action Helps Get Flooded Facilities on Line   Water Engineering & Management December 1994   Vince Stollhans
After being inundated by the flooding Mississippi, five wastewater pumping stations were quickly rebuilt and modernized.

Application Possibilities Grow for Plastic Pumps   Water Engineering & Management June 1994   Ken Comerford
A review of the role of plastic pumps in water pollution control systems.