SIL Safety Manual D103401X012 July 2010 ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator SIL Safety Manual for Fisherr ED, ET, EZ, HP, or HPA Valves with 657 / 667 Actuator Purpose Introduction 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. This manual provides necessary requirements for meeting the IEC 61508 or IEC 61511 functional safety standards.
SIL Safety Manual ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator 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 system.
SIL Safety Manual July 2010 ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator Related Literature Hardware Documents: D ANSI/ISA 84.00.01-2004 (IEC 61511 Mod.) Functional Safety – Safety Instrumented Systems for the Process Industry Sector 51.1:ED, Fisher ED, EAD, and EDR Sliding Stem Control Valves Bulletin: D100017X012 Fisher ED and EAD easy et Valves CL125 through CL600 Instruction Manual: D100390X012 Device Description 51.
SIL Safety Manual ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator 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 move the valve plug to close off the flow path through the valve body or open the flow path through the valve body.
SIL Safety Manual ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator July 2010 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 control element, will need to be evaluated to determine the Safe Failure Fraction of the subsystem.
SIL Safety Manual ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator 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. Pneumatic piping to the actuator shall be kept as short and straight as possible to minimize the airflow restrictions and potential clogging.
SIL Safety Manual ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator July 2010 Appendix A Start-Up Checklist Sample Startup Checklist The following checklist may be used as a guide to employ the ED, ET, EZ, HP, or HPA valve in a safety critical SIF compliant to IEC61508. 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 employment.
SIL Safety Manual ED, ET, EZ, HP, HPA Valves w/ 657/667 Actuator July 2010 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. Fisher, FIELDVUE, and easy e are marks owned by one of the companies in the Emerson Process Management business division of Emerson Electric Co.
