Emerson Process Management 667 - Manual (Page 2)

Instruction Manual
D100311X012
667 Size 80 and 100 Actuators
May 2011
2
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
SPECIFICATION
ACTUATOR SIZE
80 100
Nominal Effective Diaphragm Area
cm 2 1761 2902
inch 2 273 450
Yoke Boss Diameters
mm 127 127 178
inch 5 5H (1) 7
Acceptable Valve Stem Diameters
mm 25.4 or 31.8 31.8 50.8
inch 1 or 1‐1/4 1‐1/4 2
Maximum Allowable Output Thrust
Standard Cast Iron
Construction
All Steel
Construction
N 62942 88075 200170
lb 14150 19800 45000
Maximum Travel
mm 76 102
inch 3 4
Material Temperature Capabilities
_C -40 to 82
_F -40 to 180
Pressure Connections 1/4 NPT internal
Approximate Weights Without Handwheel
kg 284 544
lb 626 1200
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.