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Fisher
™
667 Diaphragm Actuator
Sizes 30/30i‐76/76i and 87
Contents
Introduction 1...................................
Scope of Manual 1.............................
Description 2.................................
Specifications 3...............................
Educational Services 3.........................
Instructional Videos 3..........................
Maximum Pressure Limitations 4................
Installation 4
....................................
Mounting the Actuator on the Valve 5............
Discussion of Bench Set 7.......................
Spring Verification 7...........................
Installing the Stem Connector Assembly 9.........
Friction Discussion 10..........................
Deadband Measurement 11.....................
Loading Connection 12.........................
Maintenance 12
.................................
Actuator 13..................................
Top‐Mounted Handwheel Assembly
(Adjustable Down Travel Stop) 15.............
Side‐Mounted Handwheel for Sizes 34/34i
through 60/60i Actuators 19..................
Side‐Mounted Handwheel Assembly for
Size 70, 76, and 87 Actuators 21...............
Casing‐Mounted Travel Stops 23.................
Parts Kits 24
.....................................
Side‐Mounted Handwheels Retrofit Kits 24........
Top‐Mounted Handwheel Retrofit Kits 25.........
Actuator Repair Kits 24.........................
Figure 1. Fisher 667 Actuator Mounted on easy‐e™
Valve
X1182
Parts List 25.....................................
Actuator Assembly 25..........................
Top‐Mounted Handwheel 26...................
Side‐Mounted Handwheel (34/34i‐60/60i) 37.....
Side‐Mounted Handwheel (70, 76, and 87) 37....
Casing Mounted Travel Stops 39.................
Introduction
Scope of Manual
This instruction manual provides information on installation, adjustment, maintenance, and parts ordering for the
Fisher 667 actuator in sizes 30/30i through 76/76i and size 87. The 667‐4 actuator in sizes 70/70i and 87 is also
covered. Refer to separate instruction manuals for information about the valve positioner and other accessories used
with these actuators.
Do not install, operate, or maintain a 667 actuator (see figure 1) without being fully trained and qualified in valve,
actuator, and accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is
important to carefully read, understand, and follow all the contents of this manual, including all safety cautions and
warnings. If you have any questions about these instructions, contact your Emerson sales office
or Local Business
Partner before proceeding.
Instruction Manual
D100310X012
667 Actuator (Size 30/30i - 76/76i and 87)
June 2017
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