Instruction Manual
D100307X012
657 Size 80 and 100 Actuators
December 2010
16
WARNING
Use only genuine Fisher replacement parts. Components that are not supplied by Emerson Process Management should not,
under any circumstances, be used in any Fisher valve, because they may void your warranty, might adversely affect the
performance of the valve, and could cause personal injury and property damage.
Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, or
maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and
end‐user.
Parts List
Note
Part numbers are shown for recommended spares only. For part
numbers not shown, contact your Emerson Process Management sales
office.
657 Sizes 80 & 100
Key Description Part Number
1 Upper Diaphragm Casing
2* Diaphragm
Size 80
Nitrile 1R6375X0072
Silicone 18B2713X132
Size 100, nitrile & TPES (thermoplastic polyester) 20A2551X012
3 Cap Screw
4 Diaphragm Plate
5 Lower Diaphragm Casing
5 Lower Diaphragm Casing, Yoke, &
Tie Rod Ass'y
6 Spring See tables
8 Cap Screw
9 Yoke
10 Actuator Stem
11 Spring Seat
12 Adjusting Screw
13 Backup Plate
14 Travel Indicator
16 Hex Jam Nut
17 Machine Screw
18 Travel Indicator Scale
19 Nameplate
Key Description Part Number
20 Drive Screw
21 Actuator Tie Rod
22 Cap Screw
23 Hex Nut
26 Stem Connector Ass'y
28 Cap Screw
29 Spring Case
33 Pipe Bushing
34 Upper Sleeve
35 Thrust Bearing
36 Adjusting Flange
60 Cover Band Ass'y
62 Cap Screw
63 Hex Nut
88 Tie Rod Washer
89 Hex Nut
91 Spring Guide
92 Cap Screw
106 Washer
107 Shroud Plate
108 Self‐tapping screw
109 Cap Screw
110 Diaphragm Retainer
111* Seal Bushing, brass
Size 100 20A2582X012
112* O‐Ring, nitrile (2 req'd) Size 100 1H8627X0042
113* O‐Ring, nitrile Size 100 1R834206992
114 Hex Nut
115 Hex Jam Nut
116 Actuator Stem Extension
117 Washer
118 Retaining Ring
120 Hex Bushing
121 Lifting Pin
123 Diaphragm Casing Cover
128 Vent Ass'y
241 Lithium grease (not furnished with actuator) ‐‐‐
244 Anti‐seize lubricant (not furnished with actuator) ‐‐‐
245* O‐Ring, nitrile Size 100 only 1C339006992
*Recommended spare parts
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