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667 Size 80 and 100 Actuators
May 2011
Do not install, operate, or maintain 667 actuators 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 Process Management sales office before
proceeding.
Table 1. Specifications
Nominal Effective Diaphragm Area
Yoke Boss Diameters
Acceptable Valve Stem Diameters
Maximum Allowable Output Thrust
Maximum Travel
Material Temperature Capabilities
Pressure Connections
Approximate Weights Without Handwheel
1. Heavy actuator‐to‐bonnet bolting.
Description
The 667 actuator is a reverse‐acting actuator. Reverse‐acting actuators use air action to lift the diaphragm (away from
the valve), and spring action opposes the diaphragm action (see figure 2). The actuator position changes in response
to varying controlled air pressure to the diaphragm. If air pressure is reduced or lost from the actuator diaphragm,
spring action will extend the actuator stem. The actuator is often used with control valves using a pneumatic
positioner for air pressure control, and where fail action will fully open or close the control valve as the actuator stem
extends.
Also, the actuator can be furnished with either a side‐mounted (size 80 only) handwheel assembly or a top‐mounted
handwheel (adjustable up travel stop) (size 100 only). The size 80 side‐mounted handwheel is normally used as an
auxiliary manual actuator. The size 100 top‐mounted handwheel is used as either a travel stop or an auxiliary manual
actuator.
The actuator can be furnished with a top‐loading capability. A top‐loaded actuator allows air pressure to be applied to
the top of the diaphragm, aiding the spring to extend the actuator stem. This air pressure increases valve seat load on
valve applications where additional seat‐loading is necessary.
Specifications
Refer to table 1 for Specifications of the 667 actuator. See the actuator nameplate for information about a specific
actuator.
2
SPECIFICATION
80
2
cm
1761
2
inch
273
mm
127
inch
5
mm
25.4 or 31.8
inch
1 or 1‐1/4
Standard Cast Iron
Construction
N
62942
lb
14150
mm
76
inch
3
_C
_F
kg
284
lb
626
Instruction Manual
ACTUATOR SIZE
100
2902
450
127
(1)
5H
31.8
1‐1/4
All Steel
Construction
88075
200170
19800
45000
102
4
-40 to 82
-40 to 180
1/4 NPT internal
544
1200
D100311X012
178
7
50.8
2
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