Appendix A
– SIS Checklist
The following checklist may be used as a guide to employ the Mark Series valve device in a safety
critical SIF compliant to IEC61508.
#
Activity
Result
Verified
By
Date
Design
Target Safety Integrity Level and PFDavg determined
Correct valve mode chosen (Fail-closed, Fail-open)
Design decision documented
Pneumatic compatibility and suitability verified
SIS logic solver requirements for valve tests defined and documented
Routing of pneumatic connections determined
SIS logic solver requirements for partial stroke tests defined and
documented
Design formally reviewed and suitability formally assessed
Implementation
Physical location appropriate
Pneumatic connections appropriate and according to applicable codes
SIS logic solver valve actuation test implemented
Maintenance instructions for proof test released
Verification and test plan released
Implementation formally reviewed and suitability formally assessed
Verification and Testing
Electrical connections verified and tested
Pneumatic connection verified and tested
SIS logic solver valve actuation test verified
Safety loop function verified
Safety loop timing measured
Bypass function tested
Verification and test results formally reviewed and suitability formally
assessed
Maintenance
Tubing blockage / partial blockage tested
Safety loop function tested
Summary of Contents for Valtek Mark
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