Fisher A41 - Installing the Valve in the Pipeline

Instruction Manual Supplement
D103546X012
A41 Valve
June 2017
7
Operation and Maintenance
Suggested Proof Test
The objective of proof testing is to detect failures within the A41 valve that is not detected by any automatic
diagnostics of the system. Of main concern are undetected failures that prevent the Safety Instrumented Function
from performing its intended function.
The frequency of proof testing, or the proof test interval, is to be determined in reliability calculations for the Safety
Instrumented Functions for which A41 valves are applied. The proof tests must be performed more frequently than or
as frequently as specified in the calculation in order to maintain the required Safety Integrity of the Safety
Instrumented Function.
The proof test shown in table 1 is recommended. The results of the proof test should be recorded and any failures that
are detected and that compromise functional safety should be reported to Emerson. The suggested proof test consists
of a full stroke of the A41 valve.
The person(s) performing the proof test of A41 valves should be trained in SIS operations, including bypass
procedures, valve maintenance and company Management of Change procedures. No special tools are required.
Table 1. Recommended Full Stroke Proof Test
Step Action
1 Bypass the safety function and take appropriate action to avoid a false trip.
2 Interrupt or change the signal/supply to the actuator to force the actuator and valve to perform a full stroke to the FailSafe state and
confirm that the Safe State was achieved and within the correct time.
3 Restore the supply/signal to the actuator and confirm that the normal operating state was achieved.
4 Inspect the A41 valve and the other final control element components for any leaks, visible damage or contamination.
5 Record the test results and any failures in your company's SIF inspection database.
6 Remove the bypass and restore normal operation.
Repair and replacement
Repair procedures in the appropriate valve instruction manual must be followed.
Manufacturer Notification
Any failures that are detected and that compromise functional safety should be reported to Emerson. Please contact
your Emerson sales office
or Local Business Partner.
Appendix A
Sample Startup Checklist
This appendix provides a Sample Startup Checklist for Fisher A41 valves. A startup checklist will provide guidance
during the final control elements emplo
yment.