Several North American government agencies and organizations share the responsibility of protecting the public’s health and safety while serving the best interests of water treatment facilities. Most water treatment facilities recognize that environmental protection is not just the responsibility of government agencies and organizations. In fact, most municipalities use the governmental regulations as guidelines to establish and maintain their own basic standards as best practices for water safety.
When dealing with a construction site that is underwater or where the water table is just above sea level, contractors must ensure that the excavation stays dry and safe for workers. This can be even more challenging in locations with conditions affected by water depth and complications like silt and sand.
Additionally, these difficult conditions may vary during seasonal weather or with the tides. Contractors need to investigate historical data and monitor fluctuations in water levels and speeds of flow to decrease the risks for workers and ensure the success of the project.
Pump manufacturers know that the engineering phrase “fit and forget” never holds true for rotating equipment. For all its reliability and longevity, a slurry pump that has been operating in a pit for several years will eventually fail.
Active magnetic bearing (AMB) reliability and availability levels have surpassed oil bearings after 10 years of technological advancements. These advances have made an impact on the industry, drawing attention from major original equipment manufacturers globally.
In sewage grinder pumps, domestic wastewater from one or a few households flows by gravitation to a pumping station equipped with one or two grinder pumps, having a discharge pipe of nominal diameter (DN) 40 or DN 50. This pumping station discharge pipe DN 40/50 is connected to the main sewer via small pipes.
During operation, all pipes from several locations are pressurized up to several bars, resulting in the pressure class for the pipes to be at least nominal pressure (PN) 6.
The years leading up to the new millennium saw a rapid evolution of industrial communication networks from analog to digital. By 2000, information technology tools were becoming integrated into fluid handling products and systems. This marked the beginning of pump and automation technology convergence.
Hamilton, Ontario, is one of Canada’s major metropolitan cities. The area’s wastewater treatment plants serve more than 500,000 Hamilton residents and the surrounding towns of Dundas, Ancaster, Water Down, Glanbrook and the former city of Stoney Creek. The treatment plants handle large volumes of sanitary and combined wastewater sewage, placing sizable demands on the pumping equipment.
The Jordan, Knauff & Company (JKC) Valve Stock Index was up 18.5 percent during the last 12 months, staying close to the broader S&P 500 Index, which was up 21.3 percent. The JKC Pump Stock Index was up 34.9 percent for the same time period.1
The Institute for Supply Management’s Purchasing Managers’ Index (PMI) was 55.3 percent in June, a slight decrease of 0.1 percent from May. The New Orders Index increased 2 percent to 58.9 percent, and the Production Index fell 1 percent to 60 percent.
Inexperienced vibration analysts encounter a common problem: They are often expected to learn too much, too fast. Instead of taking time to appropriately understand the basics, new analysts must often move directly to a busy schedule of collection and analysis without much apprenticeship. Training is almost always in a group setting, and instructors often move too quickly through the material. The facts are learned well enough for an analyst-level exam, but an in-depth understanding is often taken for granted.
Few industries can tolerate the unscheduled downtime of critical equipment. In refinery operations, it can have particularly serious implications. For an operation that runs 24 hours per day year-round, the losses—in both production and profitability—can be staggering.
Rotating equipment—pumps, motors, compressors and pillow block bearings—represents a key refinery component that, without proper planning, can become a refinery’s Achilles heel. This article presents six tips that help prevent unscheduled downtime because of rotating equipment failure.
Located in one of the fastest growing regions in the U.S., the Benton/Washington Regional Public Water Authority (BWRPWA) broke ground in 1996 for a water treatment facility serving northwest Arkansas and eastern Oklahoma. Today, it operates as a wholesaler, providing up to 24 million gallons of drinking water per day to 16 municipalities and other entities. To be a cost-effective water provider, BWRPWA constantly operates pumps at varying speeds, which makes them an ideal candidate for variable frequency drives (VFDs).
Liquefied natural gas (LNG) is natural gas in a liquid form that is clear, colorless, odorless, non-corrosive and non-toxic. It is produced when natural gas is cooled to minus 259 F (-161.66 C) through a process known as liquefaction.
During this process, the natural gas—which is primarily methane—is cooled below its boiling point, and certain concentrations of hydrocarbons, water, carbon dioxide, oxygen and some sulfur compounds are either reduced or removed.
Approximately 75,000 gallons of water are required to produce 1 ton of steel. Water transfers heat, removes scale from steel and converts gases produced in ovens and furnaces.
Nucor Corporation, the largest steel producer in the U.S., has a production capacity of more than 27 million tons of steel. The Nucor Steel Mill in Crawfordsville, Indiana, needed an innovative, cost-effective solution to monitor its water supply remotely for increased system control and visibility.
Q. What is a string test, and when should one be specified?
A. Generating a pump curve requires the measurement of head, capacity and power. From this information, the efficiency of the pump can be calculated. The efficiency shown on the pump curve is always related to the shaft input power.
The published efficiency is the pump’s hydraulic power divided by the mechanical input power to the pump shaft. It is only the efficiency of the pump, not of any other component.
Within the oil and gas industry, the rotating shafts of equipment—such as pumps, motors, compressors, gearboxes and turbines—perform an essential function in both upstream and downstream applications. This rotating equipment ensures process flow and the safety of employees and the surrounding community.
Q. Are the pump motors special for VFD operation or can any motor be used with a VFD?
A. Yes. Today there are special motors that are rated to be used with a VFD. They are commonly called "inverter rated". Older motors can be used with VFDs but there are factors that need to be reviewed such as motor lead length, voltage (460 & 575)(the higher the voltage the bigger the concern, and motor cooling because as a motor slows down it might not be able to cool itself properly especially in a constant torque application like a PD pump.
When the pump selection process starts, the required flow of the is often the only known variable for an application. For example, a system must move 2,000 gallons per minute (gpm) from a holding tank to another tank or process.
What size pump do should be installed? The size and pressure of the piping and the power of the motor must also be determined. This column helps explain how to make these decisions.
Submersible pumps, as the name suggests, are specifically designed to be submerged in the liquid that is pumped. These specialized pumps are used in industrial and commercial applications and in homes and schools.
Motor manufacturers routinely answer questions about the differences between submersible and immersible motors and the applications best served by each design. While end users ultimately decide which motor best fits their need, this article explains how the designs differ and provides information that will help end users make informed decisions.
The global metering pump market is expected to experience moderate growth during the next few years. Bouncing back from the economic slowdown, pent-up demand for metering pumps has been converted into revenue. Investments across industries and regions show demand for metering pumps for both expansions and replacement requirements.
Energy is a strategic input for the mining industry in Latin America and worldwide. Mining requires large amounts of energy, which drives up total operational costs. In Chile, mining companies consume 34 percent of the total energy produced in the country and spend approximately 20 percent of their total income on electricity costs.
According to official mining sources, the copper mining industry is expected to consume 41.1 terawatt-hours (TWh) in 2025, an increase of 95.5 percent from 2013. New projects alone will consume 36.2 percent by 2025.
Many industries use variable frequency drives (VFDs) with induction motors. Introduced in the 1960s, VFD technology has advanced considerably during the past 50 years. The engineering advancements have encouraged operators to consider other factors during particular applications, such as harmonics, energy efficiency, temperature, rise time, cable length and switching length.
High performance liquid chromatography (HPLC) is a chemical analysis technique with wide applications, from food and medical safety to manufacturing. HPLC can detect vitamin D levels in blood serum or performance enhancing drugs in urine. The technique has even been used to synthesize blood and determine DNA evidence in forensic investigations.
Sewage pumps operate based on Daniel Bernoulli’s principles (Hydrodynamica, 1738), which define the effects of balanced energy on fluid systems. This equation employs kinetic pressure and potential energies that are required to move a matrix of solids and water through a conduit with specific properties. This movement must maintain a minimum velocity of 2 feet (61 centimeters) per second to prevent the buildup of solid scaling on the walls of the piping conduit