PIETRO FIORENTINI REVAL 182, Use And Maintenance Instructions

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257
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | MAINTENANCE AND FUNCTIONAL CHECKS | REV. 00
EN
Step Action
1 Loosen the nut (9).
2 Completely release the spring (22) by turning the adjusting screw (10).
3 Remove the adjusting screw (10) together with the cap (9).
4 Remove the cap (8).
5
Remove the O-ring (38) from the cap (8) 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.
6 Remove the spring (22) and the spring supports (7).
7 Undo and remove the screws of the lower section (24).
8
Remove the bracket (14) from the sleeve (6).
9 Remove the sleeve (6).
10 Undo and remove the screws (23).
11 Remove the pilot cover (1).
12 Remove assembly ' C ' (diaphragm).
13
Unscrew and remove the nut (46) together with the washer (44)
NOTICE!
During this operation, hold the diaphragm support (43) in place.
14 Remove and replace the diaphragm (42).
15 Position the washer (44) with the conical part facing the diaphragm.
16
Insert and fix the nut (46).
NOTICE!
During this operation, hold the diaphragm support (43) in place.
17 Undo and remove the screws of the upper section (24).
18 Remove the flange (12).
19 Unscrew and remove the nut (26).
20 Remove and replace O-ring (26.1) from nut (26)
21 Remove assembly “ B ” (valve).
22
Remove the O-rings (28, 29) from the valve seat (3) 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.
23 Remove assembly “ A ” (plug) from the valve body (4) by pushing it from the bottom upwards.
24 Unscrew and remove the pilot nut (2).
25
Remove the O-ring (18) of the pilot nut (2) and replace it, taking care to lubricate it with synthetic grease.
NOTICE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
26 Remove the spring (21).
27 Remove and replace the plug (17).