Operation And Maintenance; Repair And Replacement; Status Of The Document - Fisher ED Safety Manual

SIL Safety Manual
D103401X012
Pneumatic piping to the actuator shall be kept as short and straight as possible to minimize the airflow restrictions and
potential clogging. Long or kinked pneumatic tubes may also increase the valve closure time.
The ED, ES, ET, EZ, HP, or HPA valve shall be mounted in a low vibration environment. If excessive vibration can be
expected special precautions shall be taken to ensure the integrity of pneumatic connectors or the vibration should be
reduced using appropriate damping mounts.

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.
The frequency of proof testing, or the proof test interval, is to be determined in reliability calculations for the Safety
Instrumented Functions for which an ED, ES, ET, EZ, HP, or HPA valve is 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 Process Management. The
suggested proof test consists of a full stroke of the ED, ES, ET, EZ, HP, or HPA valve.
The person(s) performing the proof test of an ED, ES, ET, EZ, HP, or HPA valve should be trained in SIS operations,
including bypass procedures, valve maintenance and company Management of Change procedures. No special tools
are required.

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 Process
Management. Please contact Emerson Process Management customer service or your local Emerson Process
Management service representative.

Status of the Document

Releases
Version History: (Version, Status, Date)
ED, ES, ET, EZ, HP, HPA Valves w/ 657/667 Actuator
November 2011
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