The purpose of this article is to help on your decision making process when presented with the option of implementing ESD/PSD Valve Partial Stroke Testing.
Processing plants contain many valves that perform safety functions that we hope need never be used in earnest. Such use means that something has gone wrong...
A Safety Instrumented Function (SIF) may be typically required to shut-off electrical equipment such as pump, compressor motors, etc., to protect or avoid unwanted dangerous events and reduce a specific risk to an acceptable level.
Operating companies can substantially increase their SIL (safety integrity level) loop rating if they adopt a rigorous maintenance and testing program on their valves.
