PIETRO FIORENTINI REVAL 182, Use And Maintenance Instructions

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315
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | MAINTENANCE AND FUNCTIONAL CHECKS | REV. 00
EN
Step Action
19 Undo the plug screw (5).
20
Remove the washer (26).
21 Remove the spring (48) and the spring support (4).
22 Unscrew and remove the nut (131).
23 Undo and remove the screws (22) of the pressure switch.
24 Remove the cover (119) and the gasket (29).
25 Undo the side screws (36) inside the control pressure switch.
26 Undo the screws (35).
27 Remove the cup (15).
28
Remove the O-ring (42) from the cup (15) 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.
29 Remove the cap (30).
30
APPLICABLE TO DN 6”-8” ONLY
Remove the O-ring (45) from the cap (30) 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.
31 Remove the seeger ring (58) from the cup (15).
32
Remove the I/DWR ring (25) from the cup (15) and replace it, taking care to lubricate it with synthetic grease.
NOTICE!
Before fitting the replacement I/DWR ring, clean the retaining slots using a cleaning solution.
33 Place the seeger ring (58) in the cup (15).
34
Take out the pressure switch unit.
NOTICE!
For the maintenance procedure of the pressure switch assembly, please refer to par. 9.4.13.
35 Undo and remove the screws (34).
36 Remove the intermediate body (13).
37 Remove the seeger ring (28) from the flange (9).
38 Remove the bush (10).
39
Remove the O-ring (41) from the flange (9) 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.
40
Remove the O-ring (42) from the bush (10) 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.