Management of Change Guide: Replacement of Fisher 667 Sizes 30-76 Diaphragm Actuators with Sizes 30i-76i Diaphragm Actuators
Fisher Management of Change Guide: Replacement of Fisher 667 Sizes 30-76 Diaphragm Actuators with Sizes 30i-76i Diaphragm Actuators Manuals & Guides
Management of Change Guide
Replacement of Fisher™ 667 Sizes 30-76
Diaphragm Actuators with Sizes 30i-76i
Diaphragm Actuators
Table of Contents
Management of Change ..................................2
Background ....................................................2
Question & Answer Checklist ..........................2
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Comparison of 667 and 667 Size i Actuators ....5
Scope of Sizes ..................................................................... 5
Instrument Attributes ........................................................ 5
Side-Mounted Handwheel .................................................. 6
Integral Mounting FIELDVUE Instruments with Internal Air
Passage .............................................................................. 6
Other Instrument and Accessory Mounting ........................ 6
Approximate Actuator Weights .......................................... 7
Conclusion ......................................................8
Management of Change
Management of Change (MOC) is a procedure used to proactively manage changes
that have the potential to impact safety or the process within a plant. Evaluating
new techniques for improving MOC approval procedures can have an impact on
plant efciency. Historically, upgrading obsolete products or replacing existing
process control equipment had been delayed or abandoned due to the extensive
paperwork involved in completing a complex MOC approval sheet.
Background
The Fisher 667 spring-opposed diaphragm actuator positions the valve plug in
response to varying controller or valve positioner pneumatic output signals applied
to the actuator diaphragm. The 667 actuator is reverse-acting and is designed to
provide dependable on/off or throttling operation of automatic control valves.
The 667 size i spring-opposed diaphragm actuator features an updated yoke design
to increase reliability and reduce complexity, and incorporates an integrated
mounting for Fisher FIELDVUE
eliminates the requirement for traditional external instrument tubing and ttings
when paired with a FIELDVUE DVC2000 or DVC6200 digital valve controller.
™
instruments. An internal air passage feature
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Question & Answer Checklist
Q: Does the proposed modication cause any changes to the piping and
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instrumentation diagram (P&ID)?
A: No.
Q: Does the proposed modication change process chemistry,
technology, or operating and control philosophies?
A: No.
Q: Does the proposed modication change how the existing plant is
operated?
A: No.
Q: Does the proposed modication change process ows?
A: No.
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Q: Does the proposed modication change existing pressure relief cases?
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A: No.
Q: Does the proposed modication change the process description?
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A: No.
Q: Have the codes and standards to which the new equipment was
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designed changed?
A: No. However, they may have been updated since installation.
Q: Does the proposed modication change the materials of construction,
such as a change in material form (cast, forged, or alloy)?
A: No.
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Q: Does the proposed modication introduce new equipment items that
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require periodic predictive maintenance?
A: No. These equipment items will require the same periodic predictive
maintenance.
Q: Does the proposed modication change existing operator training
requirements?
A: No.
Q: Does the proposed modication introduce new equipment items
that require spare parts, training manuals, maintenance procedures
or training to teach the maintenance department how to maintain
them?
A: Yes. Emerson local business partners and sales ofces offer local
training and support to help ensure operators, maintenance
personnel, and instrument technicians are trained on the 667 sizes 30i
through 76i actuators.
Q: Does the proposed modication introduce new equipment items that
require spares or obsolete spares for existing equipment?
A: No. Existing spares for the 667 sizes 30 through 76 are compatible
with the 667 sizes 30i through 76i actuators.
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Q: Does the proposed modication permanently remove the spares for
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existing pieces of equipment?
A: No.
Q: Does the proposed modication change the inspection scope or
inspection interval?
A: No.
Q: Does the proposed modication require welding work to be
performed?
A: No.
Q: Have the materials of construction been reviewed to ensure that the
metallurgy is correct?
A: No.
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Q: Does this update limit what can be mounted to the current product?
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A: No. The 667 size 30i through 76i actuators are backwards compatible.
They may require a different mounting kit, but all instruments and
accessories that are currently available will be offered for the size i
design. Refer to the Other Instrument and Mounting Kits section of
this document for more information.
Q: How does the 667 size i actuator utilize instrument tubing?
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A: The 667 sizes 30i through 76i actuators feature an internal air
passage, which eliminates the need for tubing and ttings when
paired with FIELDVUE DVC2000 or DVC6200 digital valve controllers
using the integrated instrument mounting. External instrument
tubing may also be used if desired or required by certain instruments
and accessories, as is true with the sizes 30 through 76 actuators.
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Comparison of 667 and 667 Size i Actuators
The following information is intended to provide a general comparison between
current Fisher 667 sizes 30 through 76 and 667 size 30i through 76i actuators.
Scope of Sizes
Table 1 describes the scope of actuators that will have the “size i” designation. The
actuator nameplate and Fisher serial card included with the shipment will designate
the actuator size and identify it as a “size i”, where applicable.
Note: Not all sizes of the Fisher 667 actuator portfolios will be offered as a size i at
this time.
Current Size New Size Yoke Boss Size
30 30i 2-1/8”
34 34i 2-1/8”
40 40i 2-13/16”
45 45i 2-13/16”
46 46i 2-13/16”
50 50i 3-9/16”
60 60i 3-9/16”
70 70i 3-9/16”
76 76i 3-9/16”
87 No change 5”
80 No change 5”
100 No change 5”
Table 1. 667 Size Conversion
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Figure 1: 667 Size 40 Actuator with
DVC6200 Digital Valve Controller
Instrument Attributes
The 667 size i actuator has an updated design which increases reliability and
reduces complexity by integrating the FIELDVUE instrument mounting. This
approach eliminates the need for the traditional mounting bracket. The number
of parts required to mount a FIELDVUE instrument to the size i actuator has been
reduced by one-half and the steps required to position the feedback array have
decreased. This mounting allows FIELDVUE DVC2000 and DVC6200 digital valve
controllers to be bolted directly to the yoke of the size i actuator, which results in
quick and simple mounting.
The 667 size i actuator also features an internal air passage in the yoke that mates
with the rear output port of a FIELDVUE instrument, which eliminates the need for
traditional external instrument tubing and ttings. When a traditional instrument
or additional air operated accessories (solenoids and volume boosters) are used,
the 667 size i actuator can still be tubed externally by utilizing the traditional air
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Figure 2: 667 Size 40i Actuator with
DVC6200 Digital Valve Controller
connection below the casing. This air connection will otherwise be plugged when
shipped from the factory as an assembly with a FIELDVUE instrument. The key
differences in the mounting design are compared in Figures 1 and 2.
Side-Mounted Handwheel
The side-mounted handwheel on 667 actuators has traditionally been attached
with a combination of U-bolts, hook bolts, cap screws, and nuts (as shown in Figure
3). The 667 sizes 34i through 60i actuators incorporate cast mounting pads, which
simplify the mounting procedure and reduce mounting hardware required to
attach the handwheel by 50 percent. The key differences are noted by comparing
Figures 3 and 4.
Integral Mounting FIELDVUE Instruments with Internal Air
Passage
The 667 size i actuators feature an integral mounting pad specically designed for
FIELDVUE instruments. This mounting allows the FIELDVUE DVC2000 and DVC6200
digital valve controllers to be bolted directly to the yoke of the size i actuators.
Additionally, the instrument housing has a rear output pressure port that mates
to the internal air passage of the 667 size i actuators through an o-ring sealed
connection, eliminating the need for external tubing and ttings.
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Figure 3: 667 Actuator Side-Mounted
Handwheel
Note: In order to utilize the internal air passage with the 667 size i actuator, the
DVC6200 digital valve controller Housing B must be used. The DVC6200 digital
valve controller was updated in 2014 to include this rear air connection. Without
the rear output port, the instrument must be tubed externally. The DVC2000
digital valve controller contains this rear output port as standard.
Other Instrument and Accessory Mounting
All other actuator-mounted instruments will continue to utilize the traditional yoke
mounting pads or casing bracket of the 667 size i actuators, including non-integral
mounted digital valve controllers. These mounting kits have been modied, where
necessary, in order to provide compatibility. It is important to note that some older
kits cannot be used with the size i actuator, due to interference with the cast pads
of the yoke. Therefore, when installing any instrument on the size i actuator, an
updated mounting kit must be ordered.
The following information summarizes which mounting kits have been updated.
For more specic information regarding mounting kit compatibility, please contact
your local Emerson sales ofce.
Figure 4: 667 Size i Actuator Side-Mounted
Handwheel
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Instrument Type Mounting Kit Change
3582 Positioner New connecting arm
3600 Positioner Incompatible, new kit design required
4200 Position Transmitter New connecting arm
4300 Wireless Position Monitor Incompatible, new kit design required
546, 646, 846, and i2P-100
Transducers
DVC2000/DVC6200 Instruments
with Traditional Bracket Mounting
DVC5000/DVC6000 Instruments
with Traditional Bracket Mounting
New spacers and bolts for yoke mounting
No change
No change
C1 Controller No change
4194, 4195K, and 4196 Controllers No change
VBL Booster No change
2625 Booster No change
TopWorx™ Switches No change
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REAR
OUTPUT
PORT
Figure 5. Fisher DVC2000 and DVC6200 Digital Valve Controllers with Rear Output Pressure Ports
REAR
OUTPUT
PORT
Approximate Actuator Weights
Fisher 667 size i actuators are slightly heavier than 667 actuators. Exact weight
of a specic actuator assembly is dependent upon instruments and accessories
mounted to the actuator. Table 2 lists approximate weights of actuator-only
assemblies. For more specic information, please contact your Emerson local
business partner or sales ofce.
Size kg lb Size kg lb
30 15 34 30i 17 37
34 22 48 34i 26 58
40 23 50 40i 26 56
45 41 90 45i 44 98
46 55 121 46i 59 129
50 43 94 50i 48 105
60 55 122 60i 60 133
70 115 254 70i 118 260
76 86 190 76i 89 196
Table 2: Approximate Actuator-Only Assembly Weights
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Conclusion
The enhanced Fisher 667 sizes 30i through 76i actuators reduce complexity and
increase reliability to simplify maintenance and reduce downtime. The 667 size
i actuators incorporate an integrated mounting pad for FIELDVUE instruments
and an internal air passage, which eliminates the need for external tubing and
ttings. The 667 size i actuator simplies the side-mounted handwheel (34i-60i)
mounting by reducing the number and complexity of parts required. With these
enhancements, the 667 size i actuators simplify installation and maintenance steps,
while increasing the reliability of this time-tested actuator platform.
Please contact your local Emerson sales ofce for additional details or questions
regarding Fisher 667 size i actuators.
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