Pumps on the Jobsite
Water Quality Products
February 2008
Kirsten Petersen
Pumps aid with dust control for residential development
Metering Pump Selection
Water Quality Products
April 2006
By Robin Gledhill
Weighing the pros and cons of diaphragm and peristaltic metering pumps
Out Here, Failure is Not an Option
Water Quality Products
January 2006
By James Bratton
Equipment reliability is a must in small towns like Dunn Center, N.D., where Goulds Pumps turbines and Aquavar controllers are in demand.
What Happens When a Pump No Longer Operates at Optimum Conditions?
WWDmag.com
January-December 2006
Dr. Nelik
Efficient operation of effluent pumps at water and wastewater treatment plants is critical. These days, with energy costs skyrocketing, inefficiency in pumps operation presents real and significant challenges to the plant management.
Maximizing Pump Life
Water Quality Products
November 2005
Darla Jean
Proper selection, installation and maintenance are the key elements in maximizing pump life
Pump System Controllers for Leakage Management
WaterInfoCenter
January-December 2004
Steven L. Frasure
The purpose of this paper is to discuss utilization of flow-controlled pump stations as a method to reduce distribution system leakage and, as an additional benefit, reduce power costs associated with the more traditional constant pressure systems. Though conceptual, this article discusses in general terms pump station controllers that are being used to track the varying pressure requirements in distributions systems. By anticipating those requirements based upon flow, modern day pumping systems controllers can provide smooth-flow systems that meet the minimum pressure requirements.
Selecting a Pump for Seawater Reverse Osmosis
Water Quality Products
September 2003
Darla Jean Thompson, CAT PUMPS
Although the pump is a relatively small part of the overall cost of an RO system, expenses resulting from downtime and inefficiency quickly can diminish the productivity of the system and your return on investment. Due to the corrosive atmosphere and high demands on these sea water RO systems, special attention is required in the pump selection process. There are several key factors that will help to ensure optimum pump and system performance.
PDF Version
Calif. Utility Earns Fast Payback On Pump Retrofit
Water & Wastes Digest
July 2003
The Cupertino Sanitary District (CSD) recently underwent significant equipment upgrades at its lift stations. The district's submersible pumps now operate with a new type of impeller designed to virtually eliminate blockages. During the year following the pump retrofit program, the utility saved several thousand dollars by preventing all but one blockage. Additional energy savings are being realized due to the suspended high operating efficiency offered by the new pumps.
Progressive Cavity Cake Pumps Replace Conveyor System
Water & Wastes Digest
July 2003
Fred Murillo
Costly, time-consuming and persistent maintenance problems, coupled with unacceptable odor levels, prompted a major southwest wastewater treatment plant to scrap its sludge handling system.
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.
Unstable Curves
Pump Source
April 2003
A "stable" curve is very important for a pump operation, especially for pumps operating in parallel. The higher the energy level and the more critical an installation is, the more this could become an issue.
How Does Pump Suction Limit the Flow?
Pump Source
April 2003
One of the claimed advantages of centrifugal pumps over positive displacement pumps is their ability to operate over a wide range of flow. Since a centrifugal pump operates at the intersection of a pump curve and a system curve, by varying the system curve the operating point of the pump easily is changed. The convenience and simplicity of such flow control by the discharge valve throttling comes at a price because a pump is forced to run either to the left or right of its best efficiency point (BEP). The flow must be limited on both sides of the BEP.
Point of Interest: Metallurgy
Pump Source
April 2003
Why is stainless steel so good against cavitation? If it were soft, wouldn't the imploding bubbles erode the material away in no time?
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.
Firefighting in America
Water Engineering & Management
March 2003
Bill Swichtenberg
Fire departments are a relatively recent development. The first paid fire department was created in Cincinnati in 1853 (also the first year of WEM).
PDF Version
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.
PDF Version
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.
The Invisible Sewage Plant
Water Engineering & Management
September 2002
Carl Dorsch
If you go looking for a particular sewage treatment plant in Cincinnati, Ohio, the first thing you'll notice is--you might not notice it at all. In fact, you might drive right by the facility, dismissing it as just another office building. It just does not look like a treatment plant.
PDF Version
Making the Most of Modular Pumps
Water & Wastes Digest
August 2002
In order to ensure municipal water demands were met, the city of El Dorado, Arkansas contracted with Tanner Engineering & Carter-Burgess to design five new deep wells, water transmission mains, ground storage tanks, pump station, and chlorination facilities. In order to complete the project before the sultry days of summer, the municipality and engineering firm decided to save time and energy by installing a modular pumping system.
New Wastewater Handling Pumps Eliminate Blockage Problem at California Lift Station
Water & Wastes Digest
July 2002
Monterey Regional Water Pollution Control Agency (MRWPCA) has installed a new type of pump featuring a unique, self-cleaning impeller to overcome frequent clogging experienced in recent years at Pacific Grove Station 12. Prior to replacing the station’s two original pumps, the wetwell’s limited retention and close proximity to Monterey Bay — 60 ft. away — increased the risk of bypasses reaching the beach.
Sulphur Water Solution
Water Quality Products
June 2002
Goulds Pumps
For more than 220 years people have journeyed to White Sulphur Springs, W. Va., to indulge themselves in baths of mineral water flowing from mountain springs. As inviting as the sulphur water may be, it is equally harsh on the pipes and pumps that transport it. Eight years ago Greenbrier decided to stop the corrosion once and for all by installing an all-stainless model manufactured by Goulds Pumps.
PDF Version
High Pressure Pumps Boost Water Over Hilly Jamaican Terrain
Water & Wastes Digest
April 2002
In a municipal water supply application in Jamaica, ITT Industries’ Goulds Pumps unit is supplying the pumps and the expertise to improve aging and inadequate water supply infrastructure. These new water supply projects will improve the health of the customers served there by providing clean, potable water.
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.
Neutralizing Noxious Odors at Singapore’s Ulu Pandan Sewage Treatment Works
Water Engineering & Management
January 2002
Larry Lewis and Ken Galardi, P.E.
Three significant reputations for innovative, reliable solutions to environmental problems came together as the Singapore Ministry of the Environment (ENV) planned for expansion and upgrading of its water and wastewater treatment facilities at Ulu Pandan Sewage Treatment Works .
PDF Version
Avoiding Possible Problems in Submersible Motors
Water Engineering & Management
January 2002
Tom Sgritta
Typical agricultural, domestic and municipal systems are excellent applications for these motors. Unfortunately, these motors often are used in applications that unknowingly exceed the design criteria of the motors.
PDF Version
Water Intake At New Illinois Power Plant Designed for Variable Flows
Water & Wastes Digest
December 2001
The intake system that will draw cooling makeup water from the Kaskaskia River for the $250-million Holland energy plant in Shelby County, Illinois, was designed to balance construction cost imperatives against the river’s variable flow, regulatory requirements and the owner’s operating preferences. The result is a state-of-the-art vital element for the gas-fired, combined cycle plant. As more and more closed-cycle plants are proposed, the concepts that Parsons applied along the Kaskaskia River may provide a good starting point on the drawing boards.
Pumping System Helps Town Bring New Development Up to Code
Water Engineering & Management
November 2001
When a Leicester, Mass., developer planned a subdivision of 16 houses at the same elevation as the town’s water tower, he was faced with the problem of how to provide minimum water pressure mandated by the state. He had read about the use of a Goulds Aquavar pump control system in high-rise commercial buildings, and the idea of a variable-speed system appealed to him. He thought a pressure-demand system might do the job cost effectively.
PDF Version
Problem Solver: Godwin Pump
Water & Wastes Digest
September 2001
Innovative Pumping System Diverts 75 mgd Sewer Flow During Rehab Project In Puerto Rico
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.
PDF Version
Pump Upgrade Solves Odor Problem at Texas Lift Station
Water & Wastes Digest
September 2000
Threatened by a stench-driven lawsuit several years ago, the city of Rockport, Texas, decided to convert the last of its three dozen lift stations to submersible pumps. Today, with the problem resolved, significant benefits have accrued. The odors have dissipated, the nearby residents and business people are breathing comfortably, and the sewer system is operating more efficiently.
Philadelphia Sewer Replacement
A Work of Art
Water & Wastes Digest
September 2000
Facing a task that might have daunted even Rocky, engineers from Philadelphia’s Water Department needed to replace the deteriorating Central Schuylkill east side intercepting sewer line running beneath the city’s famed Art Museum. They decided to install a parallel sewer line and use the existing sewer as an overflow line.
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.
Alberta Plant Protects Pumps With Grinder
Water & Wastes Digest
July 2000
A Muffin Monster® grinder located in front of the two peristaltic pumps helped prevent the rupture of the rubberized hose inside the pumps at the Banff, Alberta, Waste Water Treatment Plant.
Vertical Turbine Pump Provides Easy Retrofit For Georgia Facility
Water & Wastes Digest
July 2000
A MPVT multipurpose vertical turbine pump from Patterson Pump was recommended for retrofitting an existing underground lift station that pumps raw sewage to a holding pond at 2,500 gpm with a head of 65 feet in the city of Toccoa, Georgia.
Progressive Cavity Pumps Provide Solution for
New Jersey Plant
Water & Wastes Digest
July 2000
In 1988, the Edgewater Waste Water Treatment PLant underwent a significant upgrade to meet the demands of growing population in this increasingly popular area. Among the new equipment installed during this expansion were rotary lobe pumps for sludge transfer.
Automating the Sludge Pumping/Polymer Metering Systems
Water Engineering & Management
May 2000
Ted Follest
The Duffin Creek Water Pollution Control Plant (WPCP), located near Toronto, Ontario, Canada, has installed a state-of-the-art, computer controlled system to regulate polymer injection rates.
Stainless Steel Pump Production
Water & Wastes Digest
April 2000
Bill Petersen
Since the early ’80s, when stainless steel pumps were introduced to the pump market, stainless steel products have faced slow acceptance to date. Comparing the structure of the manufacturing process to that of the traditional cast iron or bronze pumps and parts, the quality, construction, and durability of stainless steel manufacturing faced controversy.
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.
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.
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.
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.
| 
RSS: WQP Articles
