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21. Mount O-ring (key 75) on the cap.
22. Screw the eye bolts (key 35) on the cap (key 70).
23. For EZHSO Series: Place the washer (key 193) on the
stem (key 147). Assemble one nut (key 151) to the stem
(key 147) until the specified torque is achieved and then
assemble another nut (key 151) to lock the position of
stem. Screw on the closing cap (key 146). Mount O-ring
(key 75) on the cap (key 70).
24. If present, set the stem (key 139) through the casing
hole and tap it into the groove in the diaphragm plate
(key 18). Slide the travel indicator fitting (key 141)
over the stem and tighten to the cap (key 70).
Intermediate Flange O-ring Maintenance DN 25,
50, 80, 150 and 200
1. Remove screws (key 24).
2. Carefully lift the upper and lower actuator casing
assembly (keys 11 and 5) off the body (key 1).
3. Remove cap screws (key 6).
4. Lift off intermediate flange (key 25).
5. Remove O-ring (key 7). Inspect the O-ring for damage
or wear and replace if necessary. Lightly lubricate
O-ring before placing in the body (key 1).
6. Place the intermediate flange (key 25) on the body,
make sure to position the screws (key 24) holes on the
outside of the body (key 1). Secure with cap screws
(key 6). See Torque Specification table for proper
torque.
7. Continue with "Disk Maintenance" section, step 7.
Actuator Assembly Maintenance DN 25, 50 and 80
1. Make a mark on the upper actuator casing (key 11)
lower actuator casing (key 5), intermediate flange
(key 25) and body (key 1) to indicate proper alignment.
2. Remove travel indicator assembly (keys 138, 139, 140,
141, 142, 143, 144, 145 and 192), by loosening the
travel indicator fitting (key 141) and lifting out the travel
indicator assembly.
3. For EZH Series: Replace the two opposite bolts
(keys 21, 22 and 23) with the two threaded stems
and nuts delivered with the unit.
CAUTION
!
Secure the removal of the casings (keys 11
and 5) by finishing with these two threaded
stems.
Types EZH and EZHSO
4. For EZH Series: Remove screws, washers and hex
nuts (keys 21, 22 and 23). Remove all the screws first,
then the two threaded stems and bracket. Take care to
balance the upper actuator casing while removing the
spring tension. Carefully lift the upper actuator casing
(key 11) off the lower actuator casing (key 5).
For EZHSO Series: Remove protective cap (key 146).
Loosen and remove hex nuts (key 151). Remove 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).
5. For EZH Series: Remove spring (key 13).
6. Remove screws (key 16). Lift off diaphragm (key 20)
and the inlet plate (key 18). Remove O-rings (keys 15
and 17). Inspect the diaphragm and O-rings for damage
or wear and replace if necessary.
7. Inspect the upper actuator casing (key 11), O-ring
(key 9), anti-friction split rings (key 8) and anti-friction
ring (key 4) for damage or wear. If damaged, remove
the O-rings and split rings; replace with new parts.
Lightly lubricate the O-ring and split rings. Place
the split rings in the body first, then slide the O-ring
between the split rings.
21
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