Final elements such as safety shutdown valves, emergency isolation valves, blowdown valves, etc., in safety instrumented functions (SIFs) are equipped with various accessories such as digital valve controllers, solenoid valves (SOV), and volume boosters, to name a...
2011 Emerson Exchange – Addressing Partial Stroke Testing Fears – Avoiding False Trips, Risk Through…
Exida's Dr. William Goble and Emerson's Afton Coleman presented Addressing Partial Stroke Testing Fears - Avoiding False Trips / Risk Through... Their abstract: It is not uncommon for some users to perform partial stroke testing (PST) using cumbersome mechanical or...
Addressing Safety Valve Opening Times with Partial Stroke Tests
A question came into the ISA's Safety email list concerning the use of valve positioners in partial stroke tests for valves used in safety shutdown applications. The person asking the question wrote: I was informed that PST using positioner such as the Fisher/Emerson...
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