Fisher ED, EH, ES, ET, EW Instruction Manual
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Instruction Manual Supplement
D103401X012
ED, EH, ES, ET, EW, EZ, HP Valves
January 2020
Safety Manual for Fisher™ ED, EH, ES, ET, EW, EZ,
or HP Valves
Purpose
This safety manual provides information necessary to design, install, verify and maintain a Safety Instrumented
Function (SIF) utilizing the Fisher ED, EH, ES, ET, EW, EZ, or HP 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 manuals:
Fisher ED and EAD easy-e
Fisher EHD, EHS, and EHT Valves NPS 1-1/2x1 through NPS 8x6 Instruction Manual (D100394X012
Fisher EHD and EHT NPS 8 through 14 Instruction Manual (D100392X012
Fisher ES and EAS easy-e Valves CL125 through CL600 Instruction Manual (D100397X012
Fisher ET and EAT easy-e Valves CL125 through CL600 Instruction Manual (D100398X012
Fisher EWD, EWS, and EWT Valves through NPS 12x8 Instruction Manual (D100399X012
Fisher EZ easy-e Control Valve Instruction Manual (D100401X012
Fisher EZ-C, ET-C, and EWT-C Cryogenic Control Valves Instruction Manual (D102175X012
Fisher HP and HPA Control Valves Instruction Manual (D101634X012
Fisher HPS-C and HPT-C Valves Instruction Manual (D104208X012
Fisher Large ET/EWT and ED/EWD Valves NPS 12 through 30 Instruction Manual (D103553X012
Failure to use this instruction manual supplement in conjunction with the above referenced manuals 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
™
Valves CL125 through CL600 Instruction Manual (D100390X012)
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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
X1183
ED or ET Valve
W2174‐3
ES Valve
X1183
EZ Valve with FIELDVUEt
DVC6200 Digital Valve Controller
W2777
EW Valve
X0183-1
HP Valve with FIELDVUE
DVC6200 Digital Valve Controller
www.Fisher.com
ED, EH, ES, ET, EW, EZ, HP Valves
January 2020
Instruction Manual Supplement
D103401X012
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.
Basic Safety: The equipment must be designed and manufactured such that it protects against risk of injury to persons
by electrical shock and other hazards and against resulting fire and explosion. The protection must be effective under
all conditions of the nominal operation and under single fault condition.
Safety Assessment: The investigation to arrive at a judgment based on the facts of the safety achieved by
safetyrelated systems.
FailSafe State: State where valve actuator is deenergized and spring is extended.
Fail Safe: Failure that causes the valve to go to the defined failsafe state without a demand from the process.
Fail Dangerous: Failure that does not respond to a demand from the process (i.e. being unable to go to the defined
failsafe state).
Fail Dangerous Undetected: Failure that is dangerous and that is not being diagnosed by automatic stroke testing.
Fail Dangerous Detected: Failure that is dangerous but is detected by automatic stroke testing.
Fail Annunciation Undetected: Failure that does not cause a false trip or prevent the safety function but does cause
loss of an automatic diagnostic and is not detected by another diagnostic.
Fail Annunciation Detected: Failure that does not cause a false trip or prevent the safety function but does cause loss of
an automatic diagnostic or false diagnostic indication.
Fail No Effect: Failure of a component that is part of the safety function but that has no effect on the safety function.
Low Demand Mode: Mode where the proof test frequency is greater than twice the frequency of demand for operation
made on the safetyrelated system.
b: Beta factor for common cause effects of failure.
l: Failure rate. λDD: dangerous detected; λDU: dangerous undetected; λSD: safe detected; λSU: safe undetected.
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Instruction Manual Supplement
D103401X012
ED, EH, ES, ET, EW, EZ, HP Valves
January 2020
Acronyms
FMEDA: Failure Modes, Effects and Diagnostic Analysis
HFT: Hardware Fault Tolerance
MOC: Management of Change. These are specific procedures often done when performing any work activities in
compliance with government regulatory authorities.
PFD
: Average Probability of Failure on Demand
AVG
SFF: Safe Failure Fraction, the fraction of the overall failure rate of a device that results in either a safe fault or a
diagnosed unsafe fault.
SIF: Safety Instrumented Function, a set of equipment intended to reduce the risk due to a specific hazard (a safety
loop).
SIL: Safety Integrity Level, discrete level (one out of a possible four) for specifying the safety integrity requirements of
the safety functions to be allocated to the E/E/PE safetyrelated systems where Safety Integrity Level 4 has the highest
level of safety integrity and 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).
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ED, EH, ES, ET, EW, EZ, HP Valves
January 2020
Instruction Manual Supplement
Related Literature
Hardware Documents:
51.1:ED, Fisher ED, EAD, and EDR Sliding-Stem Control Valves Bulletin: D100017X012
Fisher ED and EAD easy-e 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-e Valves CL125 through CL600 Instruction Manual: D100397X012
51.1:ET, Fisher ET, EAT, and ETR Sliding-Stem Control Valves Bulletin: D100022X012
Fisher ET and EAT easy-e Valves CL125 through CL600 Instruction Manual: D100398X012
51.1:EZ, Fisher EZ Sliding-Stem Control Valve Bulletin: D100025X012
Fisher EZ easy-e Control Valve Instruction Manual: D100401X012
51.1:easy-e Cryogenic, Fisher easy-e Cryogenic Sliding Stem Control Valves Bulletin: D102189X012
D103401X012
Fisher EZ-C, ET-C, and EWT-C Cryogenic Sliding-Stem Control Valves Instruction Manual: D102175X012
51.1:EW, Fisher EW Series (EWD/EWS/EWT) Sliding Stem Control Valves through NPS 12x8 Bulletin: D100023X012
Fisher EWD, EWS, and EWT Valves through NPS 12x8 Instruction Manual: D100399X012
51.1:ET/ED (Large), Fisher ED/EWD and ET/EWT Valves NPS 12 through 30 Bulletin: D103554X012
Fisher Large ET/EWT and ED/EWD Valves through NPS 12 through 30 Instruction Manual: D103553X012
51.2:EH, Fisher EH and EHA Control Valves Bulletin: D100042X012
Fisher EHD, EHS, and EHT Valves NPS 1-1/2x1 through NPS 8x6 Instruction Manual: D100394X012
Fisher EHD, EHS, and EHT Valves NPS 8 through 14 Instruction Manual: D100392X012
51.2:HP, Fisher HP Series Control Valves Bulletin: D101635X012
Fisher HP and HPA Control Valves Instruction Manual: D101634X012
Fisher HPS-C and HPT-C Valves Instruction Manual: D104208X012
Guidelines/References:
D Safety Integrity Level Selection – Systematic Methods Including Layer of Protection Analysis, ISBN 1556177771,
ISA
D Control System Safety Evaluation and Reliability, 2nd Edition, ISBN 1556176388, ISA
D Safety Instrumented Systems Verification, Practical Probabilistic Calculations, ISBN 1556179099, ISA
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