657m a – Jordan Valve 657M Series Diaphragm Actuator User Manual
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The following parts list includes complete part numbers
for components of the 657M Actuator that are gener-
ally replaceable in the field, and are most commonly
used. Key numbers correspond to those in Figure 3. If
materials and parts are required, but are not outlined in
this literature, consult your Jordan Valve representative.
Include the serial number of your actuator in all corre-
spondence regarding replacement parts.
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Table 1: Parts Reference
Key
Part Name
1
Actuator Spring
2
Spring Adjuster
3
Actuator Stem
4
Spring Seat
5
Diaphragm Plate
6*
Diaphragm
7
Upper Diaphragm Case
8
Lower Diaphragm Case
9
Yoke
10
Cap Screw
11
Cap Screw
12
Travel indicator
13
Hex Nut
14
Hex Jam Nut
15
Self-Tapping Screw
16
Travel Indicator Scale
17
Nameplate
18
Drive Screw
19
Cap Screw
20
Hex Nut
21
Stem Connector
22
Twin Speed Nut (not shown)
23
Pipe Bushing (Size 70 only)
(Not shown)
*Recommended Spare Part
Figure 3: 657M Actuator Assembly Drawing
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