January 2003


Valve signatures and partial stroke testing

The technology can be used on any valve without shutting down the process

Gruhn, P., ICS Triplex, a Rockwell Automation Company; Essam, D., Drallim

Many papers have been written over the past five years on the benefits of partial stroke valve testing.1 - 6 There are many techniques for performing such testing, most of which are mentioned in the ISA Technical Report TR84.0.03. Partial stroke valve testing is one of the most effective techniques for enabling a single valve to achieve high safety integrity level (SIL) performance. One aspect of testing, however, has not been covered - that of valve signatures. The problem. Valve assemblies, especially large ones, can be damaged during shipment and installation. One very effective way of determining if and what type of

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