Issue link: https://onenorgren.uberflip.com/i/1505205
04 ICO4-PST Solenoid Valve Partial stroke testing, or PST, has been an established technique in the oil & gas industry to help prove the functionality of final element assemblies used in safety systems for many years now. This allows the operator to demonstrate that Emergency Shutdown Valves will work to a minimum performance level when required, and operate on demand. Partial Stroke Testing (PST) – The Compromises The Compromises All current PST systems including Positioners, suffer from at least one of the following compromises: » Limited diagnostic coverage from the inability to test solenoid valves » Compatible only with pneumatic actuators » Increase in the number of safe failures thus increasing the risk of spurious trips » Unable to test the valve at the designed operating speed » Requiring additional electronic units to be fitted and engineered The first PST were mechanical, but technology quickly developed to meet the changing demands of the industry, which was looking for more intelligent systems able to provide diagnostic capability in addition to a simple partial stroke test. This led to the development of smart systems. Drawing on over 3 years technical market research with key players in the global oil & gas industry, we have developed the new ICO4-PST Smart Solenoid Valve for integrated partial stroke testing. The ICO4-PST allows the operator to address all the requirements of PST without compromise and is based on the market leading Maxseal ICO4 high performance solenoid valve which brings peace of mind to plant operators with regard to the functional safety of emergency shutdown systems. ICO4-PST represents a step change in engineering offering levels of safety and reliability never seen before.