Emerson EZH and EZHSO Series Pressure Reducing Regulators Manual de instrucciones Pagina 11
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Type EZH Relief or Backpressure Regulator
11
3. Unscrew 8 special screws (key 68). Unscrew eye bolts
(key 35) from the cap and unscrew 8 screws (key 77)
to remove cap (key 70) from the upper actuator casing
(key 5). Attach eye bolts to the upper spring seat
(key 73) and lift up and remove the sleeve assembly
(key 14). Lift off the diaphragm/plates system. Remove
O-ring (key 15) and replace it as needed. Inspect
diaphragm for damage or wear; remove screws
(key 16), lift off inlet plate (key 18) to replace diaphragm
(key 20) and O-ring (key 17).
4. Align screw holes on the cap (key 70) to the sleeve
guide screw (key 66). Remove sleeve guide (key 61)
utilizing cap (key 70) to unscrew. Inspect O-rings
(keys 9 and 64) for damage or wear, replace anti-
friction ring (key 8) and O-ring (key 9) if necessary.
Unscrew 8 cap screws (key 6) and remove crush
washers (key 67). Lift off lower casing (key 5).
Inspect O-ring (keys 7 and 63) for damage or wear.
Replace if necessary.
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. Inspect for damage or
wear. If damaged, replace with new parts.
8. Lubricate O-ring (key 34) and replace into the body.
9. Place seat ring (key 2) on top of O-ring (key 34) in body
with the curved side down and seat edge up.
10. Place cage (key 78) on the top of seat ring (key 2).
11. Place lower casing (key 5) on top of the body. Replace
washer (key 67) and tighten cap screws (key 6).
Screw sleeve guide (key 61) into lower casing (key 5)
utilizing cap (key 70).
12. Lubricate the sleeve (key 14) in the upper plate contact
area and assemble the diaphragm/plates system on
the sleeve system. Tighten screws (key 16) using
a “star” criss-cross pattern for ve times until proper
specied torque is achieved.
13. Screw the special screws (key 68) – already on the
sleeve – to x the diaphragm/plates system on the
sleeve system. See Torque Specications (Table 3)
for proper torque values. Tighten screws (key 68)
using a “star” criss-cross pattern for ve times until
proper specied torque is achieved.
14. Lubricate lower casing (key 5) on the diaphragm
contact area.
15. Carefully insert the trim system into the sleeve guide
(key 61) utilizing the eye-bolts (key 35)
that ts in the upper spring seat (key 73)
threaded hole.
16. Lubricate the diaphragm (key 20) on the upper casing
contact area.
Figure 4. Type EZH Main Valve Assembly (continued)
NPS 4 / DN 100
MLM1945_B
192
139
141
143
144
145
44
13
14
10
83
35
70
38
73
72
69
77
74
75
15
16
17
18
19
43
36
59
37
37
20
21
10
22
23
8
8
9
8
27
78
29
30
31
8
9
8
68
8
8
66
67
64
6
5
63
7
82
61
2
1
10 11
32
33
34
9
8
12
71
142
138
140
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L2
L1
L2
L2
L2
L2
S2
S2
S1
S1
S2
- Type EZH 1
- Speci cations 2
- Principle of Operation 3
- Installation 4
- Startup and Shutdown 5
- Maintenance 5
- (Refer to Figure 4) 6
- TOP VIEW 7
- GD89918_J 8
- NPS 4 / DN 100 10
- TRAVEL INDICATOR DETAIL 10
- VERSION 10
- WITHOUT TRAVEL 10
- INDICATOR DETAIL 10
- Lower Diaphragm Maintenance 13
- Upper Diaphragm Maintenance 13
- Parts Lists 14
- Parts Ordering 14
- *Recommended Spare Part 16
- “S” PORT 17
- PRX Series Mounting Parts 19
- PRX Series Pilot Parts List 19
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