For Actuators With The Top-Loaded Option - Emerson Fisher Type 667 size 80 Instruction Manuals

Type 667 Sizes 80 & 100
10. Insert the cap screws (key 13) into the upper dia-
phragm casing, and tighten the hex nuts (key 14) in
the following manner. The first four hex nuts tightened
should be diametrically opposed and 90 degrees
apart. Tighten these four hex nuts to 25 lbf ft (34
N m).
11. Tighten the remaining hex nuts in a clockwise,
criss-cross pattern to 25 lbf ft (34 N m).
12. Repeat this procedure by tightening four hex nuts,
diametrically opposed and 90 degrees apart, to a
torque of 50 lbf ft (68 N m).
13. Tighten the remaining hex nuts in a clockwise,
criss-cross pattern to 50 lbf ft (68 N m).
14. After the last hex nut is tightened to 50 lbf ft (68
N m), all of the hex nuts should be tightened again to
50 lbf ft (68 N m) in a circular pattern around the bolt
circle.
15. Once completed, no more tightening is recom-
mended.
16. For actuators with top-mounted handwheel
(see figure 9), mount gear case assembly (key 41) on
the actuator using cap screws (key 54). Install hex
nuts (key 47) and travel stop cap screw (if used) on
actuator stem extension (key 36). Install gear case
cover (key 53) with cap screws.
17. Mount the actuator on the valve, and secure with
the actuator-to-bonnet bolting. Refer to the Installation
section to connect actuator stem to valve plug stem.
For Actuators With the Top-Loaded
Option
Disassembly
For key number locations refer to figure 7, and refer to
the Top-Loaded Actuator Detail shown in figure 7.
Also, refer to figure 5 for diaphragm construction de-
tails.
1. Remove 40 cap screws (key 13) from the upper
diaphragm casing (key 1), and remove the casing.
2. Remove travel stop cap screw (key 12), hex nuts
(key 24 and 241), washer (key 37), back-up plate (key
6), diaphragm retainer (key 5), diaphragm (key 3), and
diaphragm backup plate (key 246) with O-ring (key
240).
3. Remove the 40 cap screws (key 13) from the lower
side of the casing adaptor (key 245), and remove the
adapter.
12
4. Remove the diaphragm plate (key 4) with O-ring
(key 240, diaphragm (key 3), diaphragm retainer (key
5), and backup plate (key 6).
5. Unscrew six cap screws (key 11), and remove seal
bushing retainer (key 10). Remove seal bushing (key
7). Remove and replace seal bushing O-rings (keys 8
and 9) as necessary.
WARNING
To avoid personal injury due to the sud-
den, uncontrolled movement of parts,
do not loosen the four hex nuts on the
lower diaphragm casing when spring
pressure is applied. Ensure that all
spring pre-compression has been re-
leased.
6. Unscrew the four hex nuts that secure the lower
diaphragm casing to the yoke assembly (key 67), and
remove the lower diaphragm casing. Replace yoke
assembly O-rings (key 70) as necessary.
7. The actuator spring (key 18) and stem (key 144)
can now be removed if necessary. Be sure to discon-
nect stem connector (key 31) before removing stem.
8. Unscrew six cap screws (key 11), and remove seal
bushing retainer (key 10). Remove seal bushing (key
7). Remove and replace seal bushing O-rings (keys 8
and 9) as necessary.
9. Unscrew the four hex nuts that secure the lower
diaphragm casing to the yoke assembly (key 67), and
remove lower diaphragm casing. Replace yoke as-
sembly O-rings (key 70) as necessary.
10. The actuator spring (key 18) and stem (key 144)
can now be removed if necessary. Be sure to discon-
nect stem connector (key 31) before removing stem.
11. Refer to the size 100 actuator assembly proce-
dures. Carefully clean and inspect all parts, and obtain
any replacement parts required for reassembly.
Assembly
1. If the actuator stem (key 144) was removed, lubri-
cate the threads on the stem with Lubriplate MAG-1
lubricant (key 237) or equivalent.
2. Assemble hex nuts, thrust bearing, and spring seat
(keys 26, 25, 86, and 19) to the stem. Be certain that
the thrust bearing race with the larger inside diameter
faces the spring seat. Rotate adjusting nut (key 25) to
position spring seat 12 inches (305 mm) from the end
of the stem.
3. Install actuator stem assembly into yoke assembly
(key 67). Place a support under the stem to position
the lower end of the stem 10 inches (254 mm) above
the bottom surface of the actuator (actuator-to-bonnet
joint).