Installation and Operation Manual
Argos - Pressure Regulating Valve
MI-23
Elaborado
Verificado / Aprovado
CSQ
Data
Revisão
Página
JJ
VBL
JM
13/02/19
07
22 de 32
5) As there is no pressure downstream the regulator the slam shut valve GIPS-FC will be closed. So that press
the by-pass or push button in the slam shut valve to pressurize the line between the slam shut valve and the
pressure regulator.
6) Still using the by-pass or push button of SSV, charge slowly the regulating spring of pilot in the monitor
regulator in order to admit a small pressure downstream of both regulators. Utilize the gauge to check
increase in pressure and adjust it at least 20% above of under pressure shut down.
7) As the SSV actuator will be pressure relase the by-pass or push button and reset the actuator.
8) Reset the obturator of GIPS-FC using the respective lever.
9) Open the vent valve around 20% and check if set point is still the same.
10) Turn the regulating screw clockwise of monitor regulator pilot to achieve the desired set point. Then the
monitor regulator will start operating.
11) In case of outlet pressure variation check the restrictor installed in the inlet of pilot.
12) With the pressure stable open the vent valve and check the set point.
13) If the set point is correct, close the vent valve in order to check the lock up of monitor regulator.
14) With the set point of monitor regulator correct release slowly the regulating spring of active regulator counter-
clockwise reducing the respective set point.
15) Adjust the active regulator set point at least 0.5 kgf/cm²g lower than the set point of monitor regulator in order
to allow it to stay totally open in only the active regulator will keep working.
16) At this moment, the active regulator will work and the monitor regulator will be totally opened waiting for a
possible failure of active one to work.
17) If the outlet pressure is oscillating, proceed a thin adjustment using the pilot restrictor.
18) With pressure stable open the vent valve and check the set point.
19) If the pressure is correct close the vent valve and check the lock up of active regulator.
20) While checking lock up a new simulation of stop in gas consumption by user, that is a normal condition and in
this case, both valves shall close.
21) Check if there is any leak.
22) Open SLOW AND GRADUALLY the outlet ball valve to pressurize the line.
23) If necessary, proceed with thin pressure adjustment using pilot and restrictor installed on it.
4.6.5 STAND BY STREAM ADJUSTMENT (ACTIVE / MONITOR SYSTEM)
When the pressure regulator is installed in a stand by line with active / monitor configuration it is recommended
that same procedure informed in item 4.6.4 had been done, however the set point of active regulator of stand by
stream shall be adjusted around 15% – 20% lower than the set point of regulator of working stream.
Open SLOW AND GRADUALLY the outlet ball valve to allow the downstream pressure of regulator in the stand
by stream equalize with the pressure of working stream; the stand by regulator will remain closed.
To make the regulator of stand by stream assumes the regulating turn clockwise the regulating spring of active
regulator up to achieve the set point over than the working regulator; then the stand regulator will open and
assume the operation.
It is important that both regulators keep with difference of set point at least of 5%~10% avoiding over position of
set point causing looping between the lines; it means that one regulator open, suddenly the other one, resulting in
non-precision pressure regulating.
SET POINTS RECOMMEDED TABLE
Main Active
Regulator
(PS)
Stand By
Active
Regulator
Monitor
Regulator
Relief
SSV
0.7 – 5 bar
PS x 0.9
PS x 1.15
PS x 1.4 PS x 1.5
4.5 - 18 bar
PS x 0.9
PS x 1.10
PS x 1.2 PS x 1.3
14 – 36 bar
PS x 0.95
PS x 1.05
PS x 1.2 PS x 1.3
