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Actuator Assembly Maintenance DN 100, 150
and 200 (Figures 17 and 18)
1. Remove travel indicator assembly (keys 71, 138, 139,
140, 141, 142, 143, 144, 145 and 192), if present,
by loosening the travel indicator fitting (key 141)
and lifting out the travel indicator assembly.
For EZHSO Series: Remove closing cap (key 146),
unscrew 2 nuts (key 151) and washer (key 193).
2. Remove hex head cap screws (key 21), washers
(key 22) and hex nuts (key 23). Carefully lift the upper
actuator casing (key 11) off the lower actuator casing
(key 5). Inspect the upper actuator casing (key 11),
O-rings (key 9 for EZH Series and key 158 for EZHSO
Series) and anti-friction rings (key 8 for EZH Series
and key 157 for EZHSO Series) for damage or wear.
If damaged, remove and replace with new parts.
Place the anti-friction rings in the body first, then
slide the O-ring between the anti-friction rings.
3. Lift off the diaphragm/plates system. Remove O-ring
(key 15). Inspect diaphragm and O-rings for damage
or wear and replace if necessary.
4. Remove sleeve guide (key 61) utilizing cap (key 70)
or crowbar to unscrew.
5. Remove cage (key 78).
6. Remove seat ring (key 2). Inspect seat ring for
damage or wear. If damaged, replace with new parts.
7. Remove O-ring (key 34) from body (key 1). Inspect for
damage or wear. If damaged, replace with new parts.
On the DN 200 and 300 X 150 constructions, the seat
adaptor (key 197) and O-ring (key 198) should also
be inspected for damage and replaced if damaged.
8. Lubricate O-ring (key 34) and replace into the body.
9. Place seat ring (key 2) on top of O-ring in body.
10. Place cage (key 78) on the top of seat ring (key 2).
11. Screw sleeve guide into lower casing (key 5) utilizing
cap (key 70) or crowbar.
12. Lubricate the sleeve (key 14) in the upper plate contact
area and assemble the diaphragm/plates system on
the sleeve system.
13. Screw the captured screws (key 68) — already on
the sleeve — to fix the diaphragm/plates system on
the sleeve system. See Torque Specification table
for proper torque.
14. Lubricate lower casing (key 5) on the diaphragm
contact area.
15. Carefully insert the trim system into the sleeve guide
(already assembled on the body) utilizing the eye-bolt
(key 35) that fits in the ring nut (key 73) threaded hole.
Types EZH and EZHSO
The key 9 O-rings may need removed and
stretched by hand in order for the sleeve
assembly to have sufficient clearance to
slide back into the sleeve guide.
16. Lubricate the diaphragm (key 20) on the upper casing
contact area.
17. Lubricate and mount the O-ring (key 69) on the cap
(key 70). Lubricate and mount O-rings (key 9) and
anti-friction rings (key 8) inside the cap (key 70). For
EZHSO Series, lubricate and mount O-ring (key 153)
on the stem (key 147). Carefully place the cap on the
actuator upper casing (key 11). Align the travel indicator
hole on the cap (key 70) to the upper casing travel
indicator hole. Tighten the screws (key 77) to attach
cap (key 70) to the upper casing (key 5). Carefully place
the top actuator casing on the top of the lower actuator
casing/trim system using a stud to guide.
Rotate the upper casing such that the outer
holes for sensing lines are perpendicular to
gas flow.
Note
Note
23
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