www.Fisher.com
Safety manual for Fisher
™
A41 Valve
Purpose
This safety manual provides information necessary to design, install, verify and maintain a Safety Instrumented
Function (SIF) utilizing the Fisher A41 valve.
WARNING
This instruction manual supplement is not intended to be used as a stand-alone document. It must be used in conjunction
with the following manual: Fisher A41 High Performance Butterfly Valve Instruction Manual (D500211X012
)
Failure to use this instruction manual supplement in conjunction with the above referenced manual could result in personal
injury or property damage. If you have any questions regarding these instructions or need assistance in obtaining any of
these documents, contact your Emerson sales office
or Local Business Partner.
Introduction
This manual provides necessary requirements for meeting the IEC 61508 or IEC 61511 functional safety standards.
Figure 1. Fisher A41 Valve
W9269
A41 Valve
June 2017
Instruction Manual Supplement
D103546X012
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