Although conventional engineering wisdom holds that gate valves are not to be used to throttle flow, not all gate valves are the same. The throttling knife gate valve has a proven record in the hydro industry when installed in inlet and outlet works as a guard valve or intake valve, or as an economical alternative to the fixed cone valve or jet flow gate in low- to medium-head applications.
Valve specification and selection is an important part of every new system design. Many resources are spent identifying criteria such as service conditions and piping considerations. Over time, requirements can change due to capacity, product changes and operational variations. These variations often cause problems in the system that require a broader analysis to resolve.
To continue to demonstrate DeZURIK’s expertise in Industrial Water Handling Applications, we are the proud sponsor of an ebook published by Hydrocarbon Processing magazine. The ebook is a compilation of 19 articles that cover topics such as cooling tower water treatment, wastewater reuse, steam system chemistry, and advanced biological treatment for refinery wastewater.
Independent testing demonstrates performance superiority of bonded urethane liners compared to non-bonded liners. The basis of design behind DeZURIK’s Model KUL Urethane Lined Knife Gate Valve.
When choosing a valve to control water release from a reservoir, many factors must be taken into consideration. This article discusses the variety of valves available, consideration for their operation, and advantages and disadvantages based on application.
The world’s paper use has changed dramatically and so have the mills and machines that produce a widening array of paper and packaging products. Knowing how to choose valves for applications in the growing industry of today can enhance performance and create profit. The right valves often are not those with lower initial costs, but rather those that provide the lowest cost of ownership over the life of the valve. This article describes the processes used in Pulp & Paper manufacturing and how to select valve styles to meet the demands of each application.
Huge demand, dwindling supply, aging infrastructure and more stringent standards translate into a strong and growing
Stevens Point Brewery was part of a public-private project to change how the brewery’s industrial wastewater was pumped to the wastewater treatment facility. Stevens Point Brewery installed DeZURIK Cast Iron Eccentric Plug Valves (PEC), Glass Lined Eccentric Plug Valves and Level Sensor Isolation Valves as part of this project. This article describes how the Brewery and Treatment plant were able to reduce the organic load of the effluent by pumping it to an equalization tank where it is mixed with trucked-in high strength waste before being fed into the treatment plant's anaerobic digesters.
Narragansett Bay Commission was required to upgrade its two wastewater treatment facilities to exceed a permit limit of 5 mg/L total nitrogen. Since starting up, the system has effectively reduced total nitrogen concentrations in the upper bay, exceeding expectations. DeZURIK was proud to supply pneumatically operated AWWA Butterfly Valves as part of this project.
This article identifies many performance factors to consider when locating or installing AWWA butterfly valves in a pumping, distribution or plant piping system. These factors include the direction of fluid flow through the valve; the presence of upstream and downstream fluid disturbances; the shaft orientation; the rotational direction of disc closure; the proper swing clearance for the valve disc; the valve’s proximity to liquid or solid chemical injection systems; fluid hammer; and the requirements of installation, start-up and maintenance.
Eccentric Plug Valves have been a proven performer for decades and have developed a reputation as a reliable workhorse in everything from water to chemical service, clear liquids to mining slurries, and many applications in between. This article describes the design, how a plug valve works, proper installation, multi-port valves, actuation and applications.
APCO Single Body Combination Air Valves (ASU) are designed with innovations to operate effectively on pipes filled with fluids containing grit, solids and grease. When these materials get inside air valves, the grease coagulates and can render some air valves inoperable in just weeks or months.