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Positioners and Partial Stroke Tests in Safety Applications

Posted in Final Control Element, Safety on Wednesday, February 4th, 2009. 8 comments so far
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InTech magazine has a web exclusive on the importance of safety valves in a safety instrumented system. The article, Valve failure: Not an Option, describes methods of implementing partial stroke testing (PST) to reduce the probability of failure upon demand, average (PFDavg). For those not familiar with a partial stroke test, I found this definition: […]