Have FAITH, it meets SIL3

An FMEDA Report by Exida has
shown the Netherlocks Partial Stroke
System to meet SIL 3. The report
showed the FAITH (Fail Action Integrity
Test Handling) system to be very
reliable, with 0 Fail Safe Detected, Fail
Safe Undetected and Fail Dangerous
Detected conditions recorded from
the tests. For most cases, the FAITH is
suitable for use in SIL3 applications.

The FAITH system makes it
possible to carry out a manuallyinitiated
partial stroke test on ESD
(Emergency Shut Down) valves
during normal operation, without
interrupting process flow. It limits,
with mechanical stops, the angle of
the stroke of the valve-actuator
combination to a set percentage –
ensuring the ESD valve ‘works’,
without actually shutting down the
operation.