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Instruction Manual
D100306X012
Figure 2. Schematic of Fisher 657 and 657‐4 Actuators
Educational Services
For information on available courses for Fisher 657 diaphragm actuators, as well as a variety of other products,
contact:
Emerson Automation Solutions
Educational Services - Registration
Phone: 1-641-754-3771 or 1-800-338-8158
E-mail: education@emerson.com
emerson.com/fishervalvetraining
Instructional Videos
Click here
or access the following QR code for a video on mounting a DVC6200 Digital Valve
Controller on a 657 actuator.
Click here
or access the following QR code for a video on installing a side-mounted handwheel
on a 657 actuator.
Installation
Key number locations are shown in figures 6, 7, 8, 9, and 10, unless otherwise indicated. Also, refer to figure 3 for
location of parts.
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
AIR PUSHES
STEM DOWN
STEM
AF3833‐A
A0792‐2
657 Actuator (30/30i-70/70i and 87)
SPRING LIFTS
STEM UP
June 2018
3
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