I received an email last week with some questions to an earlier post, Checking Your Safety Solenoid Valves. While protecting the emailer's anonymity, I thought I'd share the questions and answers provided by Emerson's Riyaz Ali with you. The first question was about...
I received an email with a great question to an earlier post, Improving Local Control around Safety Shutdown Valves. The question was:Can you provide more information on your Local Control panel with Safety Shutdown Valve that haves a quick exhaust systems; can the...
In the world of process safety, technology continues to advance to assist process manufacturers in their IEC 61511 safety compliance efforts. I saw a recent press release on enhancements to the Fisher DVC6000 digital valve controller. The news was:...enhancements...
Like capacitors do for electrical circuits, vessel levels provide capacity that can absorb variability within the process. In many cases, a properly tuned level controller can make the variability of the vessel outflow can be much less than the variability vessel...
I caught up with Riyaz Ali who is in our organization managing Emerson's Fisher brand of valves and regulators. You may recall Riyaz from some earlier posts on safety valve local control panels, partial-stroke test in safety applications, and testing safety solenoid...
You have to admire the way a team of engineers when presented with a challenge, come up with a better, less costly approach. Such is the case with a local control panel for a safety valve that Emerson Fisher division's Riyaz Ali showed me. You may recall Riyaz from...
Before the holidays, Dave Harrold wrote a post, A Wee Bit More About Safety Instrumented Systems, in his Dave @ AFAB Group blog. He describes his work with Dr. Angela Summers, founder/president of SIS-Tech Solutions on a guidelines book for the global IEC 61511 safety...
In an earlier post I discussed the critical role the final control element plays in a safety loop or safety instrumented function (SIF) in safety parlance. This equipment mostly stays in one position until called upon to move should an emergency situation arise....
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