197
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR
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MAINTENANCE AND FUNCTIONAL CHECKS
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REV. 00
EN
Step Action
36
Position the oil seal (62).
37
Position the diaphragm (50).
NOTICE!
The concave part of the diaphragm must face the drive chamber (pos. B, fig. 4.2).
38
Put the diaphragm protection disc (12) and the lower diaphragm support (10) in place.
NOTICE!
Check that the nozzle hole on the upper diaphragm support (13) is aligned with the hole on the
lower diaphragm support (10).
39
Apply thread locking glue to insert and fix the screws (29) according to the following tightening torque:
• DN 6”: tab. 9.96
• DN 8”: tab. 9.97
NOTICE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.
40
Unscrew and remove the lower part screws (27) from the lower cover (3).
41
Remove the lower cover (3).
42
Remove the O-ring (39) from the plug guide (2) and replace it, taking care to lubricate it with synthetic grease.
NOTICE!
Before inserting the replacement O-ring, clean the retaining slots with a cleaning solution.
43
Remove the stem guide (20), the stem (6) and the key (28).
44
Remove and replace the I/DWR ring (51) from the stem guide (20).
NOTICE!
Before inserting the replacement O-ring, clean the retaining slots with a cleaning solution.
45
Remove the O-rings (36) from the stem guide (20) and replace them, taking care to lubricate them with syn-
thetic grease.
NOTICE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
46
Remove the O-rings (40, 41) from the stem guide (20) and replace them, taking care to lubricate them with
synthetic grease.
NOTICE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
47
Remove the O-ring (42) from the stem (6) and replace it, taking care to lubricate it with synthetic grease.
NOTICE!
Before inserting the replacement O-ring, clean the retaining slots with a cleaning solution.
Summary of Contents for REVAL 182
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