ITT Advantage Actuator 2.0, Руководство по обслуживанию

Страница: 15 / 22

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 Lubricant type
Chevron FM ALC EP 2 (FDA Compliant)
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.
For more information, see Disassemble the valve in this manual.
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,
dependent 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
relieved.
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 shoulders
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 lower
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.
Maintenance
Advantage
®
Actuator 2.0 Maintenance Manual 13