ITT Engineered Valves Advantage 2.1, Руководство по обслуживанию

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b) Unscrew the diaphragm from the compressor by turning it counterclockwise.
4. Apply air to the lower cover to simplify disassembly from the body, then release the air.
5. Remove the valve diaphragm and plastic indicator spindle plug (found on the spindles) by turning
them counterclockwise.
6. Disassemble the actuator with a fixture:
a) Position the actuator centrally in a fixture, locating the compressor over the correct spacer in
the fixture lower plate.
b) Drop the stem guide through the center of the fixture handwheel and position it in the actuator
indicator spindle #10-24 UNC tapped hole (former plug location).
c) Turn the fixture handwheel clockwise until the stem rests on the actuator top cover.
d) Remove all the cover to cover caps, fasteners, and washers.
e) Turn the fixture handwheel counterclockwise until the spring load is relieved.
f) Remove the actuator upper cover, lift out spring(s), and unthread the indicator spindle.
g) Remove the top actuator plate and actuator diaphragm.
7. Replace the actuator diaphragm and spring:
a) Install the new actuator diaphragm (top hat up).
Be sure the diaphragm is positioned so the diaphragm bolt holes line up with the actuator cover bolt
holes with no stretching of the diaphragm.
b) If the spring needs to be replaced, then install a new spring.
c) If the spring does not need to be replaced, then install an old spring.
8. Reassemble the actuator with a fixture:
a) Place the correct spacer, dependent on valve size, over the pin in the fixture lower plate.
b) Position the actuator sub-assembly, including spring(s) and upper cover, over the spacer (the
compressor rests on the spacer).
c) Drop the stem guide through center of the fixture handwheel, actuator upper cover, and locate
it in the actuator indicator.
d) Position the actuator upper cover so the 1/8" NPT inlets in the upper and lower covers are in
line and the rod guides slide through the clearance holes.
e) Turn the handwheel clockwise to compress the spring(s) until the covers almost touch.
f) Remove the four threaded rod guides.
g) Start tightening the actuator cover fasteners and continue to compress the spring(s) until the
covers touch.
h) Place the remaining washers and fasteners in the top cover.
i) Tighten the actuator cover to cover fasteners.
For more information, see Tighten the actuator cover to cover fasteners in this manual.
3.12 Replace the actuator diaphragm for double acting 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.
4. Remove the actuator fasteners and lift off the upper cover.
3.12 Replace the actuator diaphragm for double acting actuator
14 Advantage® 2.1 Actuator Maintenance Manual