This 2:22 YouTube video, Emerson TopWorx DX PST with HART 7, explains how this partial stroke and emergency shutdown valve controller controls and monitors these shutdown valves. To test the capability of the valve to perform its safety action, the valve controller can partially stroke the valve that maintains its open or closed position for an extended time.
This video provides an overview of the principle of operation for Bettis Electro-Hydraulic Operator (EHO). These self-contained actuators are designed to actuate quarter-turn valves to provide fail-safe actuation for Emergency Shut Down (ESD) valves.
Engineers who design safety systems are always mindful of a few basic truths: Anything can fail, so there should always be a backup. And sometimes, backups need backups. Looking at how this concept applies to pneumatically operated emergency shutdown (ESD) valves, and other similar on/off valves, is the main topic of Emerson’s Jeff Welch’s article in the November 2020 issue of Chemical Engineering.
One of the world's leading spots to learn about new developments in industrial valves, valve actuators and fittings is the Valve World Expo. This event was held last month in Düsseldorf, Germany. During this event, Emerson launched two new products: the Bettis EHO...
I've discussed partial stroke testing (PST) as a diagnostic for the health of a valve in many posts over the years. These posts describe flow applications found in most process manufacturing facilities. But what about high-pressure and hydraulic applications including...
Update and bump: Ed was kind enough to allow us to add his presentation into Slideshare (download): Using Syncade Workflow and AMS Device Manager for SIF Proof Testing on a DeltaV SMART SIS SystemView more presentations from Emerson Exchange. Update 2: There was also...
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The opinions expressed here are the personal opinions of the authors. Content published here is not read or approved by Emerson before it is posted and does not necessarily represent the views and opinions of Emerson.