PIETRO FIORENTINI REVAL 182, Use And Maintenance Instructions

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380
REV
AL 182
EN
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | TROUBLESHOOTING | REV. 00
Failure Device Possible causes Service
Operation
faults
204/A SERIES PILOT
Plug (17) dirty or
worn
Clean and replace if needed
Friction of the diaphragm carri-
er assembly (16)
Align the bore of the dia-
phragm
support (5) with the valve
seat (3)
Worn diaphragms (16) Replace
Spring (22) collapsed or out of
level Reposition and replace if
necessary
AC out of class due to unsuita-
ble spring (22)
Replace
SG out of class due to dirty or
worn plug (17)
Clean and replace if needed
No sealing or zero
flow rate
REGULATOR
Reinforced gasket (8) dirty or
damaged
Clean and replace if needed
O-ring (35) not sealing Clean and replace if needed
Balancing piston O-ring (36) not
sealing
Clean and replace if needed
O-ring seal (42) not sealing Clean and replace if needed
O-ring (43) not sealing Clean and replace if needed
P R E - R E G U L A T O R
R31/A
O-ring (18) not sealing Clean and replace if needed
O-ring (20) not sealing Clean and replace if needed
Diaphragm (10) damaged Replace
201/A SERIES PILOT Dirty or worn plug (17) Clean and replace if needed
P R E - R E G U L A T O R
R14/A
O-ring (17) not sealing Clean and replace if needed
O-ring (18) not sealing Clean and replace if needed
O-ring (20) not sealing Clean and replace if needed
Diaphragm (10) damaged Replace
204/A SERIES PILOT
Upper diaphragm (19) dam-
aged
Replace
Dirty or worn plug (17) Clean and replace if needed