Replace The Actuator Diaphragm And Spring For Fail Open Actuator - ITT Advantage Actuator 2.0 Maintenance Manual

Lubrication schedule
Remove residual grease prior to re-lubrication. Lubricate the spindle, o-rings, and mating surfaces
whenever the topworks is disassembled.
Acceptable lubricants
Brand
Chevron

Replace the actuator diaphragm and spring for fail open actuator

One fixture exists for the series 3, 5, and 8 actuators and one for the series 16 actuator.
CAUTION:
Actuator plates are under load. Series 3, 5, 8, and 16 fail open actuators contain powerful springs and
should not be disassembled unless properly fixtured.
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.
b) Unscrew the diaphragm from the compressor by turning it counterclockwise.
4. Remove the actuator fasteners and lift off the top cover.
5. Disassemble the actuator with a fixture:
a) Place the actuator in a fixture.
b) Loosen the indicator spindle two turns.
c) Place the actuator centrally in the fixture, locating the compressor over the correct spacer,
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
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
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 shoulders
f) Slide the actuator diaphragm over the valve spindle using care to ensure the top hat is in the upper
g) Position the actuator diaphragm so the bolt clearance holes line up with threaded inserts in lower
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.
®
Advantage Actuator 2.0 Maintenance Manual
For more information, see Disassemble the valve in this manual.
dependent on valve size, in the fixture lower plate.
relieved.
Use care, as the spindle thread may pinch the actuator diaphragm and restrict spring extension.
spindle.
on the spindle.
Use care to ensure the spindle goes through the actuator plate center hole.
cover.
cover.
Lubricant type
FM ALC EP 2 (FDA Compliant)
Maintenance
13