- Published on Monday, 15 December 2014 15:42
- Written by Ed Holtgraver
Back in the “early days,” we were taught that, to properly control flow, we should select a linear valve characteristic when the valve controls more than 25% of the piping system pressure drop at full flow. We were also taught to select an equal percentage characteristic when the valve accounted for less than 25% of the pressure drop. This is an interesting guideline for sure, but many of us did not understand the rationale behind the advice. This article attempts to explain that thinking.
- Published on Monday, 17 November 2014 10:50
- Written by Bill Igel
Approximately 300,000 tons of fugitive emissions are released each year in the United States, according to the Fluid Sealing Association, and regulations put in place to lower that number are being added every year.
Combine that regulatory pressure and the stresses of today’s economic environment, and it is obvious that original equipment manufacturers (OEMs) and end users are increasingly seeking solutions that not only reduce emissions but also result in a permanent and noticeable increase in the service life of their products and equipment. Performance, value, reliability, repeatability and safety are all factors that are taken into account when developing and purchasing products to perform in this environment.
- Published on Monday, 10 November 2014 10:34
- Written by Kate Kunkel
While mountains of data are being created everywhere in the commercial, industrial and manufacturing sectors, problems arise when determining how to handle all of that information and make it a valuable part of the business.
In his presentation during VMA’s 2014 Market Outlook Workshop in Boston, Scott Tampke of Black and Veatch encouraged attendees to carefully consider the increasing need for smart analytics to make it easier for those in the manufacturing and power sectors to utilize all of that data. He pointed out that, “Leveraging data produced from smart systems is a critical success factor in power and all other industries,” said Tampke. “The challenge is knowing how to convert data into knowledge, and data analytics play a critical role.”
- Published on Monday, 20 October 2014 11:07
- Written by John V. Ballun, P.E.
PART TWO: Construction and Installation
(Ed. Note: The first part of this article is available in the Fall 2014 issue of VALVE Magazine. Read the online version HERE.)
Part One provided a thorough explanation of the variables and ratings that affect flange ratings. But that’s only a piece of the picture. This article, part two, describes how flanges are produced and the accepted methods for use and installation.
- Published on Monday, 25 August 2014 10:39
- Written by Mahshid Niknahad
Like anything made of metal, valves are subject to corrosion that compromises performance. Aluminum alloys are widely used for valves because of their low density and positive mechanical properties. Unfortunately, serious corrosion problems can occur when aluminum alloys are exposed to corrosive environments.