Although their importance to safety loops has often
been overlooked in the past, IEC standards are forcing
instrumentation technicians to significantly
increase the frequency of their safety valve testing
procedures. In order to meet and maintain desired
SIL requirements up to SIL3, it has become necessary
for manufacturers to test many of their safety valves
several times a year. Faced with these increased
valve testing requirements, end users are realizing
that they must improve upon their conventional
safety valve testing methods to avoid significant recurring labor costs.