73
DIV
AL 600
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR
|
COMMISSIONING
|
REV. A
EN
Step
Action
1
1
Partially open the bleed cock (6).
2
2
Partially open the upstream shut-off valve (V1), checking that the downstream pressure (Pd) indicated on the
downstream pressure gauge (5) does not exceed the required calibration value by over 50%.
NOTICE!
In the first line pressurisation phase, the downstream pressure (Pd) indicated on the down
-
stream pressure gauge (5) could exceed that required calibration value, depending on the
response time of the main regulator (1).
NOTICE!
With regulators with calibration pressure up to 80 mbar, the response time is longer than that of
regulators with calibration pressure above 80 mbar.
3
3
When the main regulator (1) is put into service, the downstream pressure (Pd) indicated on the downstream
pressure gauge (5) will be equal to the calibration value of the main regulator (1).
4
4
Check that the regulator with in-line monitor function (2) is fully open (100%).
NOTICE!
The regulator with monitor function (2) is fully open, when the pressure indicated on the inter
-
mediate pressure gauge (4) is the same as the upstream pressure gauge (8).
5
5
Open the upstream shut-off valve (V1) completely.
6
6
Increase the downstream pressure value (Pd) beyond the calibration pressure of the regulator with monitor
function (2), by turning the adjustment ring nut (3) of the main regulator (1) clockwise.
NOTICE!
If the setting spring of the main regulator (1) does not reach a sufficient pressure to trip the regu
-
lator with in-line monitor function (2), pressurise the chamber (A) by using an external source (see
par.
"8.6.1 - Pressurising with external source").
NOTICE!
The value of the pressure introduced by the external source can be up to 50% more than the
calibration value of the regulator with in-line monitor function (2).
7
7
Check that the regulator with in-line monitor function (2) is running, checking that the pressure indicated on
the intermediate pressure gauge (4) is comparable to the calibration value of the regulator with in-line monitor
function (2).
8
8
a - FOR INITIAL COMMISSIONING OF THE REGULATION LINE
If the downstream pressure (Pd) is not at the required calibration value for the regulator with in-line monitor
function (2), proceed as follows:
• downstream pressure value (Pd) lower than required calibration value: load the setting spring by turning
the adjustment ring nut clockwise (9)
• downstream pressure value (Pd) higher than required calibration value: load the setting spring by turning
the adjustment ring nut anti-clockwise (9)
b - AFTER MAINTENANCE OF THE REGULATION LINE
• load the setting spring (328.2) and increase the pressure value of the regulator with monitor function (2) by
turning the adjustment ring nut clockwise (9)
9
Check the calibration value of the regulator with in-line monitor function (2), referring to the downstream pres-
sure gauge (5).
NOTICE!
If the calibration pressure is not as pre-established, repeat steps 8a (first commissioning) or 8b
(after maintenance).
Summary of Contents for Dival 600
Page 156: ...TM0023ENG...
