Type 667 Sizes 80 & 100
2
Table 1. Specifications
ACTUATOR SIZE
SPECIFICATION
80 100
p
inch
2
273 450
Nominal Effective Diaphragm Area
cm
2
1761 2902
inch 5 5H
(1)
7
Yoke Boss Diameters
mm 127 127 178
p
table Valve Stem Diameters
inch 1 or 1-1/4 1-1/4 2
Acceptable Valve Stem Diameters
mm 25.4 or 31.8 31.8 50.8
p
lb 14,150
(2)
45,000
Maximum Allowable Output Thrust
N 62,942 200,170
inch 3 4
Maximum Travel
mm 76 102
Cast Iron Steel
Maximum Casing Pressure for Actuator Sizing
(3)
psig 45 70 100
bar 3.1 4.9 6.9
Cast Iron Steel
Maximum Excess Diaphragm Pressure
(4)
psig 20 20 25
bar 1.4 1.4 1.7
Cast Iron Steel
Maximum Diaphragm Casing Pressure
(5)(6)
psig 60 80 115
bar 4.1 5.5 7.9
p
p
_F
–40 to 180
Material Temperature Capabilities
_C
–40 to 82
Pressure Connections 1/4 inch NPT female
pp
roximate Weights Without Handwheel
lb 626 1200
Approximate Weights Without Handwheel
kg 284 544
1. Heavy actuator-to-bonnet bolting.
2. 19,800 lb (88,075 N) for steel construction.
3. Maximum diaphragm casing pressure that can be applied to cause travel stop contact. Indicated pressure must not be exceeded at less than full travel.
4. Maximum additional diaphragm casing pressure that can be applied after the travel stop cap screw contacts the upper diaphragm casing.
5. The sum of the pressure required to stroke the valve fully and the excess pressure added when the actuator is against the stop must not exceed these values.
6. This maximum casing pressure is not to be used for normal operating pressure. Its purpose is to allow for typical regulator supply settings and/or relief valve tolerances.
Description
The Type 667 actuator is a reverse-acting actuator.
Reverse-acting actuators use air action to lift the dia-
phragm (away from the valve), and spring action op-
poses the diaphragm action (see figure 2). The actua-
tor position changes in response to varying controlled
air pressure to the diaphragm. If air pressure is re-
duced or lost from the actuator diaphragm, spring ac-
tion will extend the actuator stem. The actuator is
often used with control valves using a pneumatic posi-
tioner 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 (size 100 only). The size 80 side-
mounted handwheel is normally used as an auxiliary
manual actuator. The size 100 top-mounted hand-
wheel is used as either a travel stop or an auxiliary
manual actuator.
The actuator can be furnished with a top-loading capa-
bility. A top-loaded actuator allows air pressure to be
applied to the top of the diaphragm, aiding the spring
Figure 2. Schematic Representation of Type 667 Actuator
DIAPHRAGM
AIR
LIFTS
SPRING
PUSHES
DOWN
ACTUATOR
STEM
AF3833-A
A6127 / IL
to extend the actuator stem. This air pressure in-
creases valve seat load on valve applications where
additional seat-loading is necessary.
Specifications
Refer to table 1 for Specifications of the Type 667 ac-
tuator. See the actuator nameplate for information
about a specific actuator.
To Next Page
Loading...
Need help?
General
