Fisher ED Safety Manual
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Fisher ED Safety Manual

Fisher automobile parts user manual
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SIL Safety Manual
D103401X012
SIL Safety Manual for Fisherr ED, ES, ET, EZ,
HP, or HPA Valves with 657 / 667 Actuator
Purpose
This safety manual provides information necessary to design, install, verify and maintain a Safety Instrumented
Function (SIF) utilizing the Fisher ED, ES, ET, EZ, HP, or HPA valve with 657/667 actuator.
Introduction
This manual provides information that is necessary for meeting the IEC 61508 or IEC 61511 functional safety
standards.
Figure 1. Fisher Valve with 667 Actuator
W1916-2
ED or ET Valve
www.Fisher.com
W2174-3
ES Valve
ED, ES, ET, EZ, HP, HPA Valves w/ 657/667 Actuator
W8120A-2
EZ Valve with FIELDVUEt
DVC6200 Digital Valve Controller
November 2011
X0183-1
HP Valve with FIELDVUE
DVC6200 Digital Valve Controller

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Summary of Contents for Fisher ED

  • Page 1 Purpose This safety manual provides information necessary to design, install, verify and maintain a Safety Instrumented Function (SIF) utilizing the Fisher ED, ES, ET, EZ, HP, or HPA valve with 657/667 actuator. Introduction This manual provides information that is necessary for meeting the IEC 61508 or IEC 61511 functional safety standards.

  • Page 2: Terms And Abbreviations

    ED, ES, ET, EZ, HP, HPA Valves w/ 657/667 Actuator November 2011 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.
  • Page 3 Safety Integrity Level 1 has the lowest. SIS: Safety Instrumented System — Implementation of one or more Safety Instrumented Functions. A SIS is composed of any combination of sensor(s), logic solver(s), and final element(s). ED, ES, ET, EZ, HP, HPA Valves w/ 657/667 Actuator November 2011...

  • Page 4: Related Literature

    Hardware Documents: 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 51.1:ES, Fisher ES and EAS Sliding-Stem Control Valves Bulletin: D100021X012 Fisher ES and EAS easy-et Valves CL125 through CL600 Instruction Manual: D100397X012 51.1:ET, Fisher ET, EAT, and ETR Sliding-Stem Control Valves Bulletin: D100022X012...

  • Page 5: Device Description

    Fisher HP Series high-pressure globe and angle valves (figure 1) have metal seats, cage guiding, quick change trim, and push-down-to-close valve plug action. HPD, HPAD, HPT, and HPAT valves use balanced valve plugs. HPS and HPAS valves use an unbalanced valve plug.

  • Page 6: Application Limits

    Safety Integrity calculations. The failure rate data listed in the FMEDA report is only valid for the useful lifetime of an ED, ES, ET, EZ, HP, or HPA valve. The failure rates will increase after this time period. Reliability calculations based on the data listed in the FMEDA report for mission times beyond the useful lifetime may yield results that are too optimistic, i.e.

  • Page 7: Sil Capability

    Random Integrity The ED, ES, 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.

  • Page 8: General Requirements

    Restore the supply/signal to the actuator and confirm that the normal operating state was achieved. Inspect the ED, ES, ET, EZ, HP, or HPA valve and the other final control element components for any leaks, visible damage or contamination. Record the test results and any failures in your company's SIF inspection database.

  • Page 9: Operation And Maintenance

    Suggested Proof Test The objective of proof testing is to detect failures within an ED, ES, ET, EZ, HP, or HPA valve that are 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.

  • Page 10: Start-Up Checklist

    Start-Up Checklist The following checklist may be used as a guide to employ the ED, ES, ET, EZ, HP, or HPA valve in a safety critical SIF compliant to IEC61508. Target Safety Integrity Level and PFD Correct valve mode chosen (Fail­closed, Fail­open)
  • Page 11 SIL Safety Manual ED, ES, ET, EZ, HP, HPA Valves w/ 657/667 Actuator D103401X012 November 2011...
  • Page 12 Responsibility for proper selection, use, and maintenance of any product remains solely 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.

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