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Intelligent valve technology and partial stroke testing
http://asu.in.ua/viewtopic.php?f=82&t=529
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Автор:  san [ 09 вересня 2014, 11:32 ]
Тема повідомлення:  Intelligent valve technology and partial stroke testing

Intelligent valve technology and partial stroke testing
Smart valves can simplify deployment of safety systems and provide
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Цитата:
Safety instrumented systems (SISs) have of become an essential components of today’s new process plants. This advance has been driven by a variety of forces, from new industry standards to increased pressure from governmental agencies worldwide and lessons learned following high-profile accidents. Partial stroke tests (PSTs) of emergency shutdown (ESD) valves have long been used to improve SIS performance. By monitoring these critical valves regularly, PSTs help ensure the system’s ability to shut a process down in the event of an emergency.
The introduction of digital technology for ESD valves has made PSTs more effective and easier to implement, helping plant personnel better balance their need to achieve higher plant integrity and safety with such considerations as spurious trip rate, initial investment costs, ongoing operational costs, system integration, and documentation needs.
This article will discuss how PSTs improve SIS performance, review the advantages of using digital shutdown devices to conduct PSTs, and outline steps to help plant personnel effectively implement this new technology.

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