Emerson’s Katherine Bartels and Adam Harmon address the subject of control valve choked flow in liquid and gas applications in an International Society of Automation Intech article, Choked Flow in Control Valves.
In a post, Valve Travel Control-Pressure Fallback, Emerson’s Riyaz Ali shared the process of how a control valve with a digital valve controller could fall back to standard pressure control upon an issue with the travel sensing mechanism.
A Digital Valve Controller, the DVC6200 (HART or Foundation Fieldbus) can detect position feedback problems and automatically revert to I/P [current to pressure] transducer mode to keep the valve operational. This avoids costly unplanned spurious trips, which are critical for plant operational performance.
In this very first episode of the EVALUE8 Podcast Series, we interview Karthik Dayalan, an expert and the Parts Business Development Manager in Emerson. Having met several customers, we discuss and explain the risk of using non-OEM parts and the benefits of using OEM Parts to operate your plant safely.
When the plant is not running the way it should, with excessive variability, alarm conditions or sub-optimized performance, plant engineers often connect with the Emerson Production Performance consultants. I had the opportunity to sit down and record a podcast with Emerson’s James Beall who is a member of the team.
In a recent Oil & Gas Engineering article, Next-gen trim cuts rotary valve cavitation, Emerson’s Brandon Bell describes how additive manufacturing, based on 3D printing technology advancements, enabled the development and manufacturing of anti-cavitation trim for rotary valves.
Many of these IIoT applications, whether powered by the Internet or internal intranets, have become more relevant as employees increasingly work from remote locations, requiring enhanced collaboration among widely dispersed personnel. An example is the remote monitoring of valves, along with collaborating for maintenance and repair, to improve reliability.
At the Emerson Exchange Americas virtual series, Emerson’s Mike Hoyme and Stanley Af demonstrated diagnostics in the final elements within a safety instrumented function.
At the Emerson Exchange Americas virtual series, Emerson’s Reid Youngdahl, Trevor Stoakes and Michael Wyatt show ways to visualize control valve noise and ways to reduce it.
At the Emerson Exchange Americas virtual series, Emerson’s David Macedonia and Ali Babakr describes methods of protecting final control elements in corrosive applications.
To summarize, mechanical equipment such as shutdown valves, control valves, actuators, and accessories such as positioners are designed keeping in mind a plant’s life of around 25 years. Though you may not find any written or stated document from any supplier or manufacturers since mechanical deterioration depends on many parameters like internal process-related conditions or external environmental conditions, operating media (air, hydraulic fluid, etc.), proper care exercised during application selection & sizing, and more.
In a Flow Control article, Understanding and solving control valve cavitation problems, Emerson’s Thirumalai Karthik (TK) Arasu opens highlighting the potential severity of cavitation.
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