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Fisher ET - page 1
www.Fisher.com SIL S afety M anual f or F isher r E D , E T , E Z , HP, o r H PA V alves w ith 6 57 / 6 67 Actuator Purpose This safety manual provides information necessary to design, install, verify and maintain a Safety Instrumented Function (SIF) utilizing the Fisher ED, ET, EZ, HP, or HPA valve with 657/667 actuator. Introduction This manual p ...
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Fisher ET - page 2
ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator SIL Safety Manual July 2010 2 Terms and Abbreviations Safety: Freedom from unacceptable risk of harm. Functional Safety: The ability of a system to carry out the actions necessary to achieve or to maintain a defined safe state for the equipment / machinery / plant / apparatus under control of the syste ...
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Fisher ET - page 3
ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator SIL Safety Manual July 2010 3 Related Literature Hardware Documents: 51.1:ED, Fisher ED, EAD, and EDR SlidingStem Control Valves Bulletin: D100017X012 Fisher ED and EAD easye t Valves CL125 through CL600 Instruction Manual: D100390X012 51.1:ET, Fisher ET, EAT, and ETR SlidingStem Control Valve ...
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Fisher ET - page 4
ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator SIL Safety Manual July 2010 4 Designing a SIF Using Fisher ED, ET, EZ, HP, or HPA Valve Safety Function When the valve’s actuator is de-energized, the actuator and valve shall move to its fail-safe position. Depending on which configuration is specified fail–closed or fail-open, the actuator will m ...
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Fisher ET - page 5
ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator SIL Safety Manual July 2010 5 user or diverse technology redundancy in the design. Random Integrity The ED, ET, EZ, HP, or HPA valves are classified as Type A devices according to IEC 61508, having a hardware fault tolerance of 0. The complete final element subsystem, with a Fisher valve as the final c ...
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Fisher ET - page 6
ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator SIL Safety Manual July 2010 6 Physical Location and Placement The Fisher ED, ET, EZ, HP, or HPA valve shall be accessible with sufficient room for the actuator, pneumatic connections, and any other components of the final control element. Provisions shall be made to allow for manual proof testing. Pneu ...
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Fisher ET - page 7
ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator SIL Safety Manual July 2010 7 Appendix A Sample Startup Checklist This appendix provides a Sample Start-up Checklist for a Fisher ED, ET, EZ, HP, or HPA valve. A start-up checklist will provide guidance during the final control element’s emplo yment. Start - Up Checklist The following checklist may b ...
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Fisher ET - page 8
ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator SIL Safety Manual July 2010 8 Note Neither Emerson, Emerson Process Management, nor any of their affiliated entities assume responsibility for the selection, use, or maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and end user ...
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