PIETRO FIORENTINI Dival 600, User Manual

Page: 79 / 156

79
DIV
AL 600
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | COMMISSIONING | REV. A
EN
8.7.2 - COMMISSIONING OF THE DIVAL 600 REGULATOR WITH LA SLAM-SHUT VALVE
For the following procedure, please refer to Figure 8.19 in par. "8.7.1 - Internal tightness check of LA slam-shut valve":
Step Action
1
1
Make sure that the bleed cock (6) is partially open.
2
Check that the LA slam-shut valve is in the shut-off position.
NOTICE!
If the LA slam-shut valve is in the open position, close it using the manual button (fig. 8.20, ref.
10).
3
3
Partially open the upstream shut-off valve (V1), checking the pressure indicated by the upstream pressure
gauge (4).
4
4
Perform the internal tightness check of the LA slam-shut valve, referring to chapter "8.7.1 - Internal tightness
check of LA slam-shut valve".
NOTICE!
In case of leaks, please refer to the chapter "10 - Troubleshooting" to clear the causes of mal -
functions.
5
5
Slowly pressurise the control line by turning the knob on the LA slam-shut valve (refer to "Operation", para-
graph 4.5.4.1), checking that the downstream pressure (Pd) indicated on the downstream pressure gauge (5)
does not exceed the required calibration value by over 50%.
6
6
When the regulator is put into service, the pressure on the downstream pressure gauge (5) will be equal to
the calibration value of the main regulator.
NOTICE!
In the first line pressurisation phase, the pressure on the downstream pressure gauge (5) could
exceed the required calibration value, depending on the response time of the regulator.
7
7
Open the upstream shut-off valve (V1) completely.
8
8
Check calibrations of the pressure switch of the LA slam-shut valve by referring to paragraph "8.7.3 - Proce-
dure for calibrating the pressure switch for the LA incorporated SLAM-SHUT VALVE".
9
9a
a - FOR INITIAL COMMISSIONING OF THE REGULATION LINE
If the pressure downstream (Pd) is not at the required calibration value, proceed as follows:
• downstream pressure value (Pd) lower than required calibration value: load the setting spring by turning
the adjustment ring nut clockwise (3)
• downstream pressure value (Pd) higher than required calibration value: load the setting spring by turning
the adjustment ring nut anti-clockwise (3)
b - AFTER MAINTENANCE OF THE REGULATION LINE
• load the setting spring (328) and increase the pressure value of the regulator (1) by turning the adjustment
ring nut clockwise (3)
10
10
Check the downstream pressure (Pd) referring to the downstream pressure gauge (5).
11
11
Close the bleed cock (6).
12
12
Check that the downstream pressure (Pd), after an increment phase, does not exceed the closing pressure
value (refer to the SG value displayed on the plate, see par."2.8 - Nameplates applied".
NOTICE!
If the pressure in the pipe section between the regulator and the downstream shut-off valve (V2)
exceeds the closing pressure value, consult chapter "10 - Troubleshooting"
to clear the causes
of the malfunctions.