99
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR
|
COMMISSIONING
|
REV. 00
EN
Step
Action
1
Partially open the drain cock (6).
2
Completely unscrew the fixing nut and adjusting screw (fig. 8.43) of the pilot (3) to relieve the spring.
3
Open the inlet shut-off valve (V1) very slowly.
NOTICE!
Check the pressure by referring to the pressure gauge (4) located upstream.
4
Turn the pilot adjustment screw (3) clockwise to load the setting spring until the regulator (1) trips.
NOTICE!
Check the pressure referring to the pressure gauge (5) located upstream.
5
Close the drain cock (6).
6
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.
7
Check all fittings between the shut-off valves (V1, V2) for sealing.
NOTICE!
Check for sealing with a foaming substance.
8
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 downstream pipeline is much lower
than the calibration pressure, shutter the opening of this valve so as not to exceed the maxi
-
mum flow rate of the system.
9
Tighten the adjusting screw and fixing nut (fig. 8.43) on the pilot (3).
Tab. 8.72.
Summary of Contents for REVAL 182
Page 404: ......
