A whitepaper, Doubling Up On Safety, explores a two-solenoid safety methodology that lets you exercise your solenoid valve online—protecting your plant, improving uptime, and enabling you to better adhere to functional safety requirements.
When is it possible to use control valves like final elements for SIS [safety instrumented system] application? I am looking for other useful documents and technical requirements when it is possible to use only control valves as the final element instead of on/off valves and not in combination with it in the SIF [safety instrumented function] application.
In a Process Industry Informer article, Redundant Solenoid Valve Architecture Improves Safety and Reliability, Emerson’s Mike Howells describes the importance of these valves for safety and architectures to exercise and test these valves for ongoing reliable performance.
In a Process Engineering article, Improve the reliability of safety instrumented systems with advanced measurement technologies, Emerson’s Julie Valentine and Meha Jha share how technology advancements combined with best practices helps drive process safety improvements.
Riyaz Ali provides clarity on when to assign the SIL suitability for valves used in different scenarios (process control vs. safety shutdown) and establish criteria to assign SIL applicability for the “Final Element”.
In a recorded webinar, Smart Electric Valve Actuators for Critical Fail-Safe Applications, Emerson’s Knut Riegel and Umberto Bianchi share how these actuators are well-suited for emergency shutdown (ESD) applications.
I received a question from a very old post here on the blog, Credit for Partial Stroke Tests in Verification Process. The person was trying to get a better understanding about this chart showing how partial stroke tests (PSTs) can extend the intervals between full stroke tests for final elements in a safety instrumented function (SIF).
At the Emerson Exchange Virtual Series, Emerson’s Joe McHugh and SIS-TECH Solutions’ Angela Summers presented on achieving increased safety and reliability through a redundant architecture.
A safety instrumented function (SIF) in a safety instrumented system (SIS) contains a sensor, logic solver and final element. All must function properly in the event of a safety demand to take the process into a safe state in coordination with other SIFs. The final...
One of the necessities in managing safety instrumented systems throughout the IEC 61511 safety lifecycle is to perform periodic proof tests on the components in a safety instrumented function to verify proper function. A short 2:44 YouTube video, How to Remotely...
A safety instrumented function (SIF) within a safety instrumented system (SIS) consists of a sensor, logic solver, and final element. As part of the IEC 61511 global safety standard, these elements within the SIF must be tested during the operational phase of the...
Partial stroke test is one of the viable means to check mechanical integrity of Final Element of Safety Instrumented Function (SIF) loop. Generally, end users struggle on question of credit of PST for improvement in SIL (Safety Integrity Level). IEC 61508 and IEC...
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