PIETRO FIORENTINI HBC 975, Manual

Page: 93 / 156

93
HBC 975
Use, maintenance and warning manual
SLAM-SHUT VALVE | MAINTENANCE AND FUNCTIONAL CHECKS | REV. 00
EN
Step Action
1
NOTE!
To disconnect the LINE OFF 2.0 device, refer to paragraph 9.4.3. tab. 9.61.
2 Undo and remove the screws (81).
3 Remove the bracket (82).
4 Unscrew and remove the nut (60) together with the indicator disc (59).
5 Unscrew and remove the nut (17).
6 Pull out the indicator rod (21).
7
Remove the guide O-ring (45) from the nut (17) and replace it, taking care to lubricate it with synthetic grease.
NOTE!
Before inserting the replacement guide ring, clean the retaining slots with a cleaning solution.
8
Remove the O-rings (46, 47) from the nut (17) and replace them, taking care to lubricate them with synthetic
grease.
NOTE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
9
Undo and remove the screws (35).
NOTE!
If the HB/97 built-in slam-shut valve is in the inverted position, support it during this step to pre -
vent any falls.
10 Remove the HB/97 built-in slam-shut valve and fit it vertically with the plug (71) on an anti-shock surface.
11 Undo and remove the screws (89).
12 Remove the locking ring (8).
13 Remove and replace the reinforced gasket (7).
14
Remove the O-ring (93) and replace it, taking care to lubricate it with synthetic grease.
NOTE!
Before inserting the replacement O-rings, clean the retaining slots with a cleaning solution.
15 Put the reinforced gasket (7) back in place.
16 Put the locking ring (8) back in place.
17
Insert and fix the screws (89) according to the following tightening torques:
• DN 4” > tab. 9.50;
• DN 6” > tab. 9.51;
• DN 8” > tab. 9.52;
• DN 10” > tab. 9.53;
• DN 12” > tab. 9.54.
NOTE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.