Installation and Operation Manual
Argos - Pressure Regulating Valve
MI-23
Elaborado
Verificado / Aprovado
CSQ
Data
Revisão
Página
JJ
VBL
JM
13/02/19
07
23 de 32
Note: the values informed in the table above are recommendations based on good practices; however, the set
points can be changed if previously consulted and approved by GASCAT Engineering.
4.6.6 COMMISSIONING (WORKING MONITOR SYSTEM)
Utilizing as reference the assemblage scheme presented on item 4.5.4 proceed with descriptive indicate for
commissioning of ARGOS pressure regulators in a stream where the configuration is working monitor, considering
that the recommendations realized in the item 4.6.1 were totally observed.
The procedure considers utilization of slam shut valve model GIPS-FC and pressure regulator model ARGOS.
1) Close the vent valve.
As the ball valves of skid are closed utilize the vent valve to simulate a low flow and then proceed with
adjustment of pressure regulator.
2) With the line still pressurized turn clockwise the regulating spring of pilot of second stage pressure regulator;
and counter-clockwise the spring of override (extra) pilot of the regulator of first stage. It will make the
regulator remain in the closed position.
3) Verify if the restrictor installed in the inlet of pilot is open around 30%~70%.
4) Open SLOW AND GRADUALLY the inlet ball valve or when the skid has by-pass utilize it to pressurize the
line.
5) Since there is no pressure downstream the regulator the slam shut model GIPS-FC is closed. So that, press
the by-pass or push button of slam shut valve to pressurize the line between the slam shut and pressure
regulator.
6) Still using the by-pass or push button of SSV turn clockwise the regulating spring of monitor regulator to admit
a small pressure downstream of both regulators. Use the pressure gauge to check it and adjust the regulator
at least 20% above set point of under shut down of SSV.
7) As the actuator is already pressurized release the by-pass or push button and reset the actuator.
8) Reset the obturator of slam shut valve model GIPS-FC using the respective lever.
9) Open the vent valve 20% and check if the pressure is still the same.
10) Turning clockwise the regulating spring of override (extra) pilot of first stage pressure regulator to increase the
set point up to desired value.
In this case, only the first stage pressure regulator will be in operation.
11) In case of outlet pressure variation open or close the restrictor installed in the inlet of pilot.
12) Since the pressure is stable, open the vent valve and check the set point.
13) If the pressure is correct, close the vent valve and check lock up.
14) Since the set point was achieved turn counter-clockwise the regulating spring of pilot of second stage pressure
regulator to allow it regulate the pressure.
15) Adjust set point of second stage pressure regulator at least 0.5 kgf/cm²g lower than override (extra) pilot of
first stage pressure regulator to allow the regulator remain totally open and only the second stage pressure
regulator works.
16) In case of outlet pressure variation open or close the restrictor installed in the inlet of pilot.
17) Since the pressure is stable, open the vent valve and check the set point.
18) If the pressure is correct, close the vent valve and check lock up.
19) Turn counter-clockwise the regulating spring of main pilot of first stage pressure regulator up to set point
desired to allow such regulator assume the regulating pressure. In this moment, the pressure regulating skid
will reduce the pressure in two stages.
20) Verify if there is any leak in the connectors and fittings.
21) Open SLOW AND GRADUALLY the outlet ball valve to pressurize the skid completely.
22) If necessary, proceed with thin pressure adjustment using pilot and restrictor installed on it.
