PIETRO FIORENTINI HBC 975, Manual

Page: 103 / 156

103
HBC 975
Use, maintenance and warning manual
SLAM-SHUT VALVE | MAINTENANCE AND FUNCTIONAL CHECKS | REV. 00
EN
Step Action
70
Insert and fix the nuts (67) 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.
71
Remove the O-ring (38) from the flange (70) and replace it, taking care to lubricate it with synthetic grease.
NOTE!
Before inserting the replacement O-ring, clean the retaining slots with a cleaning solution.
72
HB/97 put the built-in slam-shut valve back in place.
NOTE!
If the slam-shut valve is in the inverted position, support it during this step to prevent any falls.
73
Insert and fix the screws (35).
NOTE!
Tighten the screws according to the cross diagram in paragraph 9.4.2.2.
74
Insert the indicator rod (21).
NOTE!
The rod must be fitted into the slot in the piston (65).
75 Insert and fix the screws (17).
76 Put the bracket (82) in place.
77
Insert and fix the screws (81) 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.
78 Fit and set the indicator washer (59) to “0”.
79 Insert and fix the screws (60).
80
Undo and remove the screws (32).
81
Remove the blind flange (4) together with the O-ring (38).
NOTE!
In this step, support the SB/97 valve to prevent any falls.
82
Replace the O-ring (38) and lubricate it with synthetic grease.
NOTE!
Before inserting the replacement O-ring, clean the retaining slots with a cleaning solution