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667 Size 80 and 100 Actuators
Instruction Manual
Form 1432
December 2007
15
when the diaphragm adaptor (key 245,
figure 5) is installed.
CAUTION
If the diaphragm (key 3) is installed so
air pressure is applied to the fabric
side, it will immediately delaminate the
sealing surface (smooth surface) from
the fabric. The delamination can cause
immediate failure of the diaphragm’s
ability to retain pressure.
6. Install the diaphragm backup plate, diaphragm
retainer, diaphragm, O-ring, and diaphragm plate
(keys 6, 5, 3, 240, and 4) on the actuator stem
(key 144).
7. Carefully fold the diaphragm between the
diaphragm backup plate (key 246) and the case
adapter (key 245) while lowering the adapter onto
the lower diaphragm casing assembly (key 67).
Install all 40 cap screws (key 13) and finger tighten.
Note
When you replace actuator
diaphragms in the field, take care to
ensure the diaphragm casing cap
screws are tightened to the proper
load to prevent leakage, but not crush
the material. Perform the following
tightening sequence with a manual
torque wrench for size 80 and 100
actuators.
CAUTION
Do not use lubricant on these cap
screws and nuts. Fasteners must be
clean and dry.
Overtightening the cap screws (key 13)
can damage the diaphragm. Do not
exceed 68 NSm (50 lbfSft) torque.
8. Tighten the cap screws (key 13) in the following
manner. The first four cap screws tightened should
be diametrically opposed and 90 degrees apart.
Tighten these four cap screws to 34 NSm (25 lbfSft).
9. Tighten the remaining cap screws in a clockwise,
crisscross pattern to 34 NSm (25 lbfSft).
10. Repeat this procedure by tightening the four cap
screws, diametrically opposed and 90 degrees apart,
to a torque of 68 NSm (50 lbfSft).
11. Tighten the remaining cap screws in a
clockwise, crisscross pattern to 68 NSm (50 lbfSft).
12. After the last cap screw is tightened to 68 NSm
(50 lbfSft), all of the cap screws should be tightened
again to 68 NSm (50 lbfSft) in a circular pattern
around the bolt circle.
13. Once completed, no more tightening is
recommended.
CAUTION
Install the diaphragm with the fabric
side facing toward the spring. Smooth
the edge of the diaphragm to avoid
wrinkling and be careful that the
diaphragm fold does not get pinched
when the upper diaphragm casing
(key 1) is installed.
14. Install the diaphragm backup plate, diaphragm,
diaphragm retainer, backup plate, washer
(keys 246, 3, 5, 6, 37, 241 and 24), hex nut
(key 241), and hex nut (key 24).
15. For actuators with a top-mounted handwheel
(see figure 9), screw the actuator stem extension
(key 36) as far as it will go into the actuator stem
connector (key 42) before tightening the hex nut
(key 28).
16. For actuators without the handwheel, Install
the travel stop cap screw (key 12), and tighten the
screw.
17. Position the upper diaphragm casing (key 1) on
the diaphragm (key 3) and align the holes.
Note
When you replace actuator
diaphragms in the field, take care to
ensure the diaphragm casing cap
screws are tightened to the proper
load to prevent leakage, but not crush
the material. Perform the following
tightening sequence with a manual
torque wrench for size 80 and 100
actuators.
CAUTION
Do not use lubricant on these cap
screws and nuts. Fasteners must be
clean and dry.
Overtightening the cap screws (key 13)
can damage the diaphragm. Do not
exceed 68 NSm (50 lbfSft) torque.