The presence of air in a pipeline and it's impact on operations is probably one of the most misunderstood phenomena in our industry today. Many operational problems are blamed on inadequate thrust blocking, improper pipeline bedding, etc. These problems include broken pumps, valves and pipe, as well as faulty instrumentation readings. In reality, many of these problems are not caused by improper installation of the line, but by failure to de-aerate the line. It has been said that if a pipeline is properly de-aerated, you can't guarantee against a line break. However, if you don't properly de-aerate a pipeline, you should be prepared for one. ...Read more
There are as many types of valve coatings as there are types of valves, but in the waterworks industry, the current standard is epoxy coating. Epoxy coatings are highly corrosion and wear resistant and adhere to cast iron surfaces with adhesion strengths of 3000 psig or more and often serve as the seating surface for resilient seated valves. Epoxy coatings are certified for use in drinking water systems and have proven to be a reliable coating for over forty years. The coatings prevent corrosion, tuberculation, and wear in valves and promote efficient flow of fluids through piping systems. For more information, read the white paper, "Protective Interior Coatings for Waterworks Valves”. ...Read more
Operating a large waterworks butterfly valve at the Lithia Water Treatment Plant in Tampa Florida is no easy task. A 48-inch diameter butterfly valve like the one shown requires about ten-thousand foot-pounds of torque, which requires the use of a gear actuator and handwheel. Gear actuators come in two varieties, worm gears and traveling-nut. The traveling-nut actuator with externally adjustable stops was specifically designed for use with butterfly valves and offers some distinct advantages. ...Read more
Valves can be found just about anywhere today: in our homes, under the street, in commercial buildings and in thousands of places within power and water plants, paper mills, refineries, chemical plants and other industrial and infrastructure facilities. The valve industry is truly broad-shouldered, with segments varying from ...Read more
Pigging refers to the practice of using devices known as "pigs" to perform various maintenance operations such as cleaning and inspecting on a pipeline which is done without stopping the flow of the product in the pipeline. This is accomplished by inserting the pig into a ...Read more
This Halloween season, we thought we would share some of the spookiest water operator videos and news stories we have come across, all with one thing in common: they really happened! (Because we all know that truth is scarier than fiction.) ...
In the WWEMA Corner of the July 2017 Issue of WaterWorld, Don Schwerin talks about the differences between Buy American, AIS, ARRA and more. ...Read more
Val-Matic's John V. Ballun and John R. Holstrom answer the Question of the Month - What Are Key Factors to Consider When Installing Large Butterfly Valves Belowground? ...Read more
Imagine: No water to drink, or even to make coffee with. No water to shower, flush the toilet, or do laundry. Hospitals would close without water. Firefighters couldn't put out fires and farmers couldn't water their crops. ...
Located in northwestern Ohio, the City of Findlay is the epicenter of Hancock County. Built in 1931, the Findlay Water Treatment Plant (WTP) was upgraded in 1965 and again in 1984. The Findlay WTP serves the 40,000 residents of the greater Findlay area and supplies an average of six million gallons of potable water per day and approximately 22,000 MG annually. ...Read more
Floodwater, particularly when widespread from natural disasters as experienced with Hurricane Harvey and Irma, most likely contains various organic and inorganic contaminants that may detrimentally affect human health and performance of waterworks products. These contaminants may be absorbed by product components such as elastomer seals and coatings. ...Read more
The answer is now YES! Since recently achieving the WRAS Material Approval for the EPDM compound used in the Val-Matic Swing-Flex® Resilient Hinge Check Valve, there is now the option for producing an eccentric plug valve with BS 6920 compliant wetted parts. ...
Although geothermal energy generation is a growing renewable resource, it still presents challenges for equipment suppliers in controlling the often harsh geothermal fluids. A geothermal plant can use direct steam, hot water, or a mixture of steam and water but in all cases, the fluids can contain ...Read more
Drinking water supplies in the United States are among the safest in the world. However, even in the U.S., drinking water sources can become contaminated, causing sickness and disease from waterborne germs, such as Cryptosporidium, E. coli, Hepatitis A, Giardia intestinalis, and other pathogens. ...Read more
Pumps must overcome the combination of the static head and the friction head of piping systems. The friction head is caused by roughness in the pipe and local flow disturbances such as fittings and valves. Valves come in many varieties, but they all create some friction head ...
Water pumping systems that include a full-port ball valve for control save a significant amount of electrical energy given the negligible head loss of the ball valve. Also, when equipped with a smart control system, the pumping system is automatically protected from adverse operating conditions. ...Read more
Butterfly and ball valves are typically supplied with either a traveling nut or worm gear type actuator. Both types are listed in the applicable AWWA Valve Standards, C504 and C507. Each type has some important characteristics that affect the performance of the valve assembly...Read more
Given the scarcity of freshwater in drought-stricken areas, water reuse projects are essential. Equipping a wastewater plant with a non-potable or reclaimed water reuse system reduces water demand, provides revenue for the water utility and reduces the costs of the outfall system. The 900-MW Sandy Creek Energy Station in Riesel, Texas, deploys technology for coal-fueled plants utilizing steam generators and technology designed for sustainability through efficient, low emission systems, processes and components. ...
So just how do we get electricity from water? Actually, hydroelectric and coal-fired power plants produce electricity in a similar way. In both cases a power source is used to turn a propeller-like piece called a turbine, which then turns a metal shaft in an electric generator, ...
Valves are used to control or moderate flow of gases, liquids, and slurries, and contain pressure. For reasons of economy, manufacturers supply them in a limited range of materials. Each of these materials is suitable for a limited range of common exposures and has the benefit of being easily available in a short time frame. ...
Society’s desire for a clean environment shines light on the importance of understanding the essential role wastewater treatment plants have in our communities. Congress passed the Clean Water Act in 1972 to control the discharge of effluent into water systems and waterways, and provided grants to allow municipalities to meet these new requirements. Since then ...