17
Dival SQD-1 - MT 234-E - 02-2020
EN
INSTALLATION
Before commissioning the regulator you must check that all the on/off valves (inlet, outlet, any by-pass) are closet and
that the gas is at a temperature which will not lead to malfunction.
5.3
COMMISSIONING THE REGULATOR
If there is also a relief valve in the line, refer to par. 4.1 to check it
Fig. 12
1)
partially open the downstream bleed cock 6;
2)
very slowly open the inlet on/off valve V1;
3)
stabilize pressure upstream and downstream; through the pressure gauge 5 check that the downstream pres
-
sure shows the wished calibration value. Otherwise, adjust the calibration acting on the proper internal ring
nut (fig. 1), rotating it clockwise to increase and counter-clockwise to decrease;
5)
close the bleed cock 6 and verify the tightness of the regulator and the value of its closing overpressure;
6)
check the tightness of all the joints between the on/off valves V1 and V2 using a foam Solution;
7)
very slowly open the downstream on /off valve V2, until the line is completely filled.
5.4
COMMISSIONING THE REGULATOR WITH INCORPORED LA/.. SLAM-SHUT
If there is also a relief valve in the line, refer to par. 4.1 to check it.
Fig. 13
