103
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR
|
COMMISSIONING
|
REV. 00
EN
Step
Action
8
Turn the adjustment ring nut (Fig. 8.42) of the V/25 accelerating valve (11) anti-clockwise to decrease the set-
ting of the cut-in pressure value until a gas discharge from the gas outlet is detected.
NOTICE!
Check for sealing with a foaming substance.
9
Turn the adjusting screw (fig. 8.42) of the monitor pilot (10) anti-clockwise to decrease the value of the down-
stream pressure to the selected monitor operating value.
NOTICE!
•
Ensure that the accelerating valve (12) has cut off the gas discharge;
•
Check the pressure referring to the pressure gauge (5) located upstream.
10
Turn the adjusting screw (fig. 8.42) on the pilot (3) anti-clockwise to relieve the setting spring until the regulator
trips.
NOTICE!
Check the pressure referring to the pressure gauge (5) located upstream.
11
Make sure that the PM/182 monitor (8) is fully open (100%) by checking the position of the stroke indicator
rod (fig. 4.6).
12
Check that the calibration pressure is at the set value by referring to the downstream pressure gauge (5).
NOTICE!
•
To reduce the pressure (down to the pre-set value): turn the pilot adjustment screw (3) anti-clock
-
wise;
•
To increase the pressure (up to the pre-set value): turn the pilot adjustment screw (3) clockwise.
13
Slowly close the drain cock (6).
14
Check that the downstream pressure, after an increase phase, does not exceed the shut-off pressure value
(refer to the SG value on the nameplate, see par. 2.8).
NOTICE!
•
If the downstream pressure exceeds the shut-off pressure value, refer to chapter 10 “Fault
search and troubleshooting” to remove the causes of the malfunction;
•
Check the pressure referring to the pressure gauge (5) located upstream.
15
Check all joints between the shut-off valves (V1, V2) for sealing.
NOTICE!
Check for sealing with a foaming substance.
16
Open the downstream shut-off valve (V2) very slowly until the piping has been filled completely.
NOTICE!
•
If at the beginning of this operation, the pressure in the piping is much lower than the cali
-
bration pressure, shutter the opening of this valve so as not to exceed the maximum flow
rate of the system;
•
Check the pressure referring to the pressure gauge located upstream.
17
Tighten the adjusting screws and pilot nuts (3, 10).
Tab. 8.74.
Summary of Contents for REVAL 182
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