PIETRO FIORENTINI REVAL 182, Инструкция по эксплуатации и обслуживанию

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101
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | COMMISSIONING | REV. 00
EN
Step Action
7
Turn the adjusting screw (fig. 8.43) on the pilot (3) anti-clockwise to relieve the setting spring until the regulator
trips.
8
Make sure that the PM/182 monitor (8) is fully open (100%) by checking the position of the stroke indicator
rod (fig. 4.6).
9
Check that the calibration pressure is at the set value by referring to the downstream pressure gauge (5).
NOTICE!
• To reduce the pressure (to the required value): turn the pilot adjustment screw (3) anti-clock -
wise;
• To increase the pressure (to the required value): turn the pilot adjustment screw (3) clock -
wise.
10 Slowly close the drain cock (6).
11
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.
12
Check all joints between the shut-off valves (V1, V2) for sealing.
NOTICE!
Check for sealing with a foaming substance.
13
Slowly open the downstream shut-off valve V2 until the piping has been completely filled.
NOTICE!
• If at the beginning of this operation the pressure in the pipeline is much lower than the cali -
bration pressure, it will be advisable to 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 (5) located upstream.
14 Tighten the adjusting screws and fixing nuts (fig. 8.43) on the pilots (3, 11).
Tab. 8.73.