c)
Place the actuator centrally in the fixture, locating the compressor over the correct spacer, de-
pendent on valve size, in the fixture lower plate.
d) Place the support plate and spacer plate on the actuator top plate.
e) Turn the fixture handwheel clockwise to remove the load from the indicator spindle.
f)
Remove the spindle and turn the fixture handwheel counterclockwise until the spring load is re-
lieved.
Use care, as the spindle thread may pinch the actuator diaphragm and restrict spring extension.
6.
Replace the actuator diaphragm and spring:
a) Place the spring in the lower cover and set an actuator plate, concave side down, over the
valve spindle.
b) Position the actuator in the fixture over the spacer.
c)
Place the support plate on the actuator plate.
d) Set the spacer plate on top.
e) Turn the fixture handwheel clockwise and compress the spring until the actuator plate should-
ers on the spindle.
Use care to ensure the spindle goes through the actuator plate center hole.
f)
Slide the actuator diaphragm over the valve spindle using care to ensure the top hat is in the
upper cover.
g) Position the actuator diaphragm so the bolt clearance holes line up with threaded inserts in low-
er cover.
7.
Reassemble the actuator with a fixture:
a) Place an actuator plate, concave side up, over the valve spindle.
b) Prepare spindle nut surface with Loctite 7649 Primer N.
c)
Apply Blue Loctite #242 and thread the indicating spindle on the valve spindle by hand.
d) Turn the fixture handwheel counterclockwise to remove the load and remove the actuator from
the fixture.
e) Clamp the slotted plate in a vise and pull so the actuator slips free.
f)
Tighten the indicator spindle with a wrench using care to ensure the actuator diaphragm re-
mains properly aligned.
g) Position the upper actuator cover so the 1/8" NPT inlets in the upper and lower covers are in
line.
h) Tighten the actuator cover to cover fasteners.
For more information, see Tighten the actuator cover to cover fasteners in this manual.
3.11 Replace the actuator diaphragm and spring for fail close
actuator
One fixture exists for the series 3, 5, and 8 actuators and one for the series 16 actuator.
1.
If present, remove the switch package.
2.
Disconnect the air lines.
3.
ITT recommends that the following steps be performed on a bench, with the body removed from the
actuator:
a) Disassemble the valve.
For more information, see Disassemble the valve in this manual.
3.11 Replace the actuator diaphragm and spring for fail close actuator
Advantage® 2.1 Actuator Maintenance Manual
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