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Richard Harvey

Business Development Manager, Energy Sector, IMI Precision Engineering

Richard has a BSc in Applied Physics from Nottingham University, registered Incorporated Engineer, Member of the Institute of Engineering & Technology, TÜV certified Functional Safety Professional and a member of the ISA with over 15-years in functional safety and partial stroke testing including field service, development and product management

Solenoid Valves - A critical Element in Partial Stroke testing

Functional Safety & SIS

Abstract: This paper will explore the history of partial stroke testing with regard to different types of PST and how solenoid valves have been used in these systems. It will the analyse how key elements of solenoid valve design, with regard to spool vs. poppet, direct vs. indirect acting and wet vs. dry armatures, impacts the design of the PST system. It will investigate how to maximise the performance requirements for an ESD system with PST and also how these designs affect the SIL performance, engineering, and compromises in operation. The paper will analyse the new breed of electronic PST systems demonstrate how the criticality of solenoid valve design has now been raised to an even higher level to further demonstrate the importance of robust solenoid valve design and examine generic examples to compare how these designs perform. It will finally look at what factors can now be assessed to design an optimum PST system for testing all final elements including the solenoid valve.

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