PIETRO FIORENTINI REVAL 182, Use And Maintenance Instructions

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390
REV
AL 182
EN
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | TROUBLESHOOTING | REV. 00
Failure Device Possible causes Service
Downstream pressure
increase with slam-shut
device shutting off
SLAM-SHUT VALVE
SB/82 BUILT-IN SLAM-
SHUT VALVE
DN 1” – 3”
O-ring (40)
not sealing
Clean and replace if needed
Plug pad (19) not sealing Clean and replace if needed
Conical seat (8)
damaged
Replace
O-ring (39)
not sealing
Clean and replace if needed
SLAM-SHUT VALVE
SB/82 BUILT-IN SLAM-
SHUT VALVE
DN 4” – 8”
O-ring (40)
not sealing
Clean and replace if needed
Plug pad (19) not sealing Clean and replace if needed
O-ring (44)
not sealing
Clean and replace if needed
Conical seat (8)
damaged
Replace
O-ring (39)
not sealing
Clean and replace if needed
SLAM-SHUT VALVE
SB/82 BUILT-IN SLAM-
SHUT VALVE
DN 10”
O-ring (42)
not sealing
Clean and replace if needed
Reinforced gasket (8) not
sealing
Clean and replace if needed
O-ring (39)
not sealing
Clean and replace if needed
Valve seat (2)
damaged
Replace
BYPASS DEVICE
HP2/2
Pad O-ring (5)
not sealing
Clean and replace if needed
O-ring (15)
not sealing
Clean and replace if needed
Valve seat (6) damaged Replace
O-ring (20)
not sealing
Clean and replace if needed
Tab. 10.189.