Europe,
Middle
East,
and
Africa
Only
Type FL
12
REGuLaTOR maINTENaNCE
(SEE FIGURES 8 TO 18)
!
WaRNING
all maintenance procedures must be carried
out only by qualified personnel.
If necessary, contact our technical support
representatives or our authorized dealers.
The regulator and it’s pressure accessories are subject
to normal wear and must be inspected periodically and
replaced if necessary.
The frequency of inspection/checks and replacement
depends upon the severity of service conditions and
according to applicable National or Industry codes,
standards and regulations/recommendations.
In accordance with applicable National or Industry codes,
standards and regulations/recommendations, all hazards
covered by specific tests after final assembling before
applying the CE marking, shall be covered also after every
subsequent reassembly at installation site, in order to ensure
that the equipment will be safe throughout its intended life.
Before proceeding with any maintenance work, shutoff the
gas upstream and downstream from the regulator, also
ensure that there is no gas under pressure inside the body
by loosening the upstream and downstream connections.
Upon completion, check for leaks using suds.
Replacing Seal Pad
a. Remove spacer (key 24). If no spacer was used during
installation, disconnect all fittings preventing removal of
outlet stub pipe and take the latter off.
b. Loosen screws (key 5) and slide out outlet flange (key 22
or 200 for the widened outlet and SRS versions), replace
O-ring (key 18).
c. Remove pad holder (key 19) from the outlet cover (key 13).
Only for the DN 200 size the pad holder remain attached to
the outlet flange and it is not necessary dismount it.
d. Loosen screw (key 25), pad retainer (key 21), remove and
replace pad unit (key 20).
e. Check that the part of sleeve (key 16) that touches
pad unit (key 20) is intact. If not, carry out general
maintenance and replace sleeve.
f. Reassemble by reversing the above sequence, being
careful not to damage O-ring (key 18). To facilitate fitting of
pad holder (key 19), use an air pump that, when connected
to fitting (key 17), causes sleeve (key 16) to open fully.
a. Let the filtered, and if necessary preheated, gas
reach
the regulator.
b. Slightly open the On-Off valve located downstream.
c. Open the On-Off valve located upstream just slightly and
very slowly.
d. Wait until the downstream pressure is stabilized.
e. Finish opening the upstream and downstream valves slowly.
PILOT aDjuSTmENT
To change the regulator outlet pressure, turn the pilot
adjusting screw clockwise to increase pressure or counter
clockwise to decrease pressure.
To change the slam-shut setpoints (overpressure and/or
underpressure), remove the spring closing cap of the pilot
and turn the adjusting screws clockwise to increase outlet
pressure or counter clockwise to decrease pressure.
Monitor the outlet pressure with a test gauge during
the adjustment.
ShuTDOWN
!
WaRNING
To avoid personal injury resulting from
sudden release of pressure, isolate the
regulator from all pressure before attempting
disassembly and release trapped pressure
from the equipment and pressure line.
In case of disassembly of main pressure
retaining parts for checks and maintenance
procedures, external and internal tightness
tests have to be done according to
applicable codes.
PERIODICaL ChECKS
CauTION
It is recommended that checks be made
periodically on the efficiency of the regulator
and pilots.
Slowly close the On-Off valve located downstream
and check the pressure in the line section between the
regulator and the valve.
Some increase in the downstream pressure should be
observed, due to overpressure closure.
The pressure will then stabilize.
If a steady increase in the downstream pressure occurs, this
is a clear sign that the unit is not tightshut.
Check whether the leakage is due to the regulator or the pilot
and then proceed with maintenance as required.
