169
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
18
Place the rod guide (17) in the eyebolt flange (14).
19
Assemble the eyebolt flange (14) with the upper cover (3).
20
Insert and fix the screws of the upper section (27) according to the following tightening torque:
• DN 1”: tab. 9.91
• DN 2”: tab. 9.92
NOTICE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.
21
Insert the indicator rod (18) into the rod guide (17).
22
Unscrew and remove the balancing stem guide (11).
NOTICE!
Hold the diaphragm assembly in place by positioning the spanner in the holes in the upper dia
-
phragm support (13).
23
Remove the balancing piston (15) from the balancing stem guide (11).
24
Remove and replace the O-rings (36, 43) from the balancing stem guide (11), lubricating them with synthetic
grease.
NOTICE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
25
Position the balancing piston (15) in the balancing stem guide (11).
26
Take out the diaphragm unit (10, 12, 13, 21, 29, 45, 50, 62)
27
Undo and remove the screws (29) from the lower diaphragm support (10).
28
Remove diaphragm support (10) and upper diaphragm protection disc (12).
29
Remove the diaphragm (50) together with the oil seal (62).
30
Remove the lower diaphragm protection disc (12) from the upper diaphragm holder (13).
31
Remove and replace the O-ring (45) from the upper diaphragm support (13), lubricating it with synthetic grease.
NOTICE!
Before inserting the replacement O-ring, clean the retaining slots with a cleaning solution.
32
Place the upper diaphragm protection disc (12) in the upper diaphragm holder (13).
NOTICE!
Check that the hole on the nozzle (21) is free from dirt or foreign bodies.
33
Position the oil seal (62).
34
Position the diaphragm (50).
NOTICE!
The concave part of the diaphragm must face the drive chamber (pos. B, fig. 4.2).
Summary of Contents for REVAL 182
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