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Posts Tagged ‘smart positioner’

2011 Emerson Exchange – Addressing Partial Stroke Testing Fears – Avoiding False Trips, Risk Through…

Posted in Emerson Exchange, Final Control Element, Safety on Tuesday, October 25th, 2011. No comments yet
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Exida’s Dr. William Goble and Emerson’s Afton Coleman presented Addressing Partial Stroke Testing Fears – Avoiding False Trips / Risk Through… Their abstract: It is not uncommon for some users to perform partial stroke testing (PST) using cumbersome mechanical or pneumatic devices, or avoid PST altogether due to fears of spurious trip. This workshop addresses […]

Positioner Pneumatic Pressure Bleed in Throttling Control Valves

Posted in Energy, Final Control Element on Tuesday, June 14th, 2011. 2 comments so far
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With the emphasis on improving energy efficiency and reducing greenhouse gas emissions, process manufacturers have turned to pneumatic low-bleed and zero-bleed valve positioners. Emerson’s Riyaz Ali copied me on an email about a recent article that mentioned a zero-bleed valve positioner. Riyaz noted that positioners mounted on valves used in throttling applications need to be […]

Impacts of Control Valve Diagnostics

Posted in Asset Optimization, Final Control Element on Monday, February 14th, 2011. No comments yet
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Plants tend to run longer in between turnarounds, or the period of time in which a plant is shut down for maintenance. These turnaround time intervals can be three, four, five, or even longer depending on the process and the industry. Emerson’s Riyaz Ali, whom you may recall from many process safety and valve-related posts, […]

Diagnosing Valve Performance Issues

Posted in Abnormal Situation Prevention, Final Control Element on Friday, March 26th, 2010. No comments yet
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My good friend Riyaz Ali, whom you may recall from earlier process safety and digital valve controller-related posts, was kind enough to send me an article he’s recently written. The subject is performance diagnostics for control valves. Since control valves are in the heart of the action controlling the flow of the process, they are […]