Pumps & Systems, May 2008 While complete packaged gas and dry chemical feed systems have been in the water treatment industry for many years, liquid metering pump packaged systems are relatively...
Packaged Pumping Applications and Best Practices
Packaged pumping systems are gaining in popularity due to benefits including ease of installation, single source responsibility and streamlined manufacturing. Packaged systems simplify the...
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...
Progressive Cavity Cake Pumps in Wastewater Treatment
Replacing conveyors with pumps improves efficiency and sanitation in an Ohio wastewater treatment plant.A Delaware, Ohio, wastewater treatment plant needed a solution to replace its conveyer system....
Pumps & Systems, June 2008While driving a car with the gas pedal to the floor and then controlling your speed using the brake is obviously inefficient, many facilities use the approach for pump...
Pump Curve Accuracy
Digitization methods are critical when using pump selection software.First of Two PartsMore than 150 pump manufacturers present their pump performance data electronically. These digital pump catalogs...
Pump Performance Monitoring
A Comparison Between Conventional and Thermodynamic MethodsEnergy conservation is the need of the hour. Pumps are found in abundance in almost every industry and utility. Of them, the most common are...
PumpCalcs: Be the Pump Designer
I have seen, and I am sure you have too, countless examples of installed pumps that are poor hydraulic fits. These selection mistakes are called off-design pump selections, bad actors, misapplied...
A mature community with an aging infrastructure, Beaver Falls, Pa., has faced many challenges. Home to one of the oldest and largest wastewater treatment facilities in Beaver County, the city has been...
An Arizona mining company and an engineering pump system expert share a mutual understanding of what is needed to improve the electrowinning process that drives the copper mine's operations.Our...
Have you ever experienced this? The pump that you purchased for one specific performance is placed in service and operates at another point that is completely different from its original design point...
Specialty Materials Help Improve Pump Reliability and Save Energy
Efficiency degradation in pumps can be related to three areas. Worn clearances between the wear rings of the impeller and the casing can increase leakage and drop the volumetric efficiency of the...
Stable and Unstable Pump Curves
A “stable” curve is important for pump operation, especially for pumps in parallel operation. The higher the energy level and the more critical an installation, the more the pump curve could...
Structural Composite Parts
 Composites significantly reduce energy consumption, maintenance costs and repair costs.Today, tremendous effort is made to reduce energy consumption. The Department of Energy (DOE) and the...
Success Story of the Year 2011: Rockwell Automation & Insyght Systems
Rockwell Automation, Insyght Systems & the city of Hamilton grab the winThe 2011 Success Story of the Year competition has been a huge...success. Thanks so much to all the organizations that...
The Benefits of Close-Coupled, Sealless Magnetic Drive Pumps
ChemTreat, Inc., boosts manufacturing efficiency and improves customer service.At some point in the development of most businesses, through hard work and a commitment to customer satisfaction, growth...
The Benefits of Pump Restoration and Coating, Part 2
The Restoration Process—Before and AfterIn the November 2010 issue of Pumps & Systems, this column began a two part series to analyze a study conducted on the Monroe County Water Authority...
Improve pumping system uptime and efficiencyImproving the reliability and efficiency of pumping systems is crucial. The expanding capabilities of operator interfaces (OI) provide a powerful tool to...
The New Wastewater
Modern trash causes big issues for wastewater collection systems.Daily challenges abound for collection system operators and administrators as they work to support the proper operation of their pipes,...
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...
Pumps & Systems, January 2008Last month we looked at possible ways to optimize pumping systems. This month we'll look at some energy efficiency organizations and utilities that have taken on the...
Trends in Variable Speed Technology
Choose the right variable speed motor for specific equipment.Why and how do leading OEMs choose a variable speed motor for their equipment? While rated efficiency has been an important driver in the...
Pumps & Systems, June 2008The rotary lobe pump belongs to the positive displacement pump family. It is a dual shaft pump design with external timing gears, allowing two intermeshing rotors to...
Improving the Performance of Existing Pumping Systems
Variable Frequency Parallel Pump Analyzer
There are several ways to control two identical, parallel pumps operating under variable frequency control in pumping applications. One method is to size a single drive to handle both pumps and vary...
Variable Speed Pump Analysis
When selecting a pump for variable speed operation, a number of conditions must be evaluated. For example, will the performance curve allow the range of operation required by the application? Will the...
Variable Speed Pump Operation Cuts Energy Costs; System Static Head Reduces Savings
Determining pump speed using the affinity rules can be a challenge.The days of inexpensive electricity are gone. With environmental pressures on the oil, coal and nuclear industries, electricity...
Pumps & Systems, December 2008Editor's Note: This is part two of a three part series about variable speed pump selection. To read the previous article, click here. To read the next article in...