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Instruction Manual
D103472X012
Table 8. Fisher 667NS2 Spare Parts*
Replacement
Part Description / Key No.
Part Number
Refer to
Diaphragm (Key 105)
following table
Refer to
Casing Gasket (Key 123)
following table
O-ring
Refer to
(Key 117)
following table
O-ring
Refer to
(Key 118)
following table
O-ring
Refer to
(Key 193)
following table
Seal Bushing (Key 116),
Refer to
Bushing (Key 133)
following table
Thrust Bearing Race (Key
129) Thrust Bearing (Key
Refer to
130) Bearing, Ball (Key 153)
following table
Bearing, Thrust (Key 160)
1. ME/n = construction/installation spares. P/n = preoperational spares. S/n = start-up spares. O/n = operational spares.
2. Dependent on good storage practices and conditions.
3. Maintenance schedule is dependent on service conditions.
Table 9. Keys 101 and 143 Yoke Mounting Studs and Washers
ACTUATOR SIZE
QUANTITY
45A
70A
70B
80A
8
80B
80C
80C with Hand
Operation
1. If a yoke spacer is being used, an additional 8 studs and 8 washers will be needed to mount it to the valve body.
*Recommended spare parts
Spare
Qty
Classification
Part
Code
Non-Safety
1
O/n
Related
Non-Safety
1
O/n
Related
Non-Safety
2
O/n
Related
Non-Safety
1
O/n
Related
Non-Safety
1
O/n
Related
Non-Safety
1
O/n
Related
Non-Safety
1
O/n
Related
(1)
STUD SIZE, INCH
3/4-10 x 3.5
3/4-10 x 3.75
3/4-10 x 4.25
7/8-9 x 4.75
Spare Part Requirement Rationale
(1)
Recommendation to purchase this spare part is based on shelf life
restrictions. The diaphragm is a key component within the actuator
construction, required to ensure optimal performance over time.
Degradation of the diaphragm could lead to inconsistencies with
valve operation. Emerson recommends replacing this component
every 6 years.
If the lower diaphragm casing must be removed from the yoke and
this seal is broken, this gasket should be replaced.
If the seal bushing must be removed, this O-ring should be
replaced.
If the seal bushing must be removed, this O-ring should be
replaced.
If the lower dia;phragm plate must be removed, this O-ring should
be replaced.
Cycled parts will exhibit wear over time. Based on experience and
testing, Emerson recommends replacing this component every 12
years.
Cycled parts will exhibit wear over time. Based on experience and
testing, Emerson replacing this component every 12 years.
KEY 101 MOUNTING STUD
PART NUMBER
1B958831012
1K552131012
1P590231012
1P9261X0282
667NS2 Actuator
Shelf
(3)
Life
See FGS8A31 for
information
N/A
regarding
elastomer shelf life.
Does not exhibit a
N/A
tendency to
degrade over time.
See FGS8A31 for
information
N/A
regarding
elastomer shelf life.
See FGS8A31 for
information
N/A
regarding
elastomer shelf life.
See FGS8A31 for
information
N/A
regarding
elastomer shelf life.
Does not exhibit a
N/A
tendency to
degrade over time.
Does not exhibit a
N/A
tendency to
degrade over time.
KEY 143 WASHER
MATERIAL
PART NUMBER
1A375738982
SA 193 B7
1A5198X0032
March 2022
Shelf Life
(2)
Rationale
31
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