Installation and Operation Manual
Domus HF - Pressure Regulating Valve
MI-23
Elaborado
Verificado / Aprovado
CSQ
Data
Revisão
Página
JJ
VBL
JM
15/12/17
00
14 de 19
4.8 COMMISSIONING AND START-UP
4.8.1 GENERAL RECOMMENDATIONS
Before proceeding with commissioning of equipment, it is important always:
1) Verify if the equipment is properly installed according to the recommendations hereby described.
2) Close the blocking valves of inlet, outlet and by-pass, when application, of each stream.
3) Open the vent valve downstream the last regulator in the respective stream.
4) Certify that the Skid is NOT pressurized.
ATENTION:
* Under none hypotheses proceed with the stream pressurization where the equipment is installed by the
valve downstream the equipment.
* Under none hypotheses proceed with the stream pressurization where the equipment is installed by the
valve upstream the equipment, as drain filer, for example.
5) Verify if all connectors are properly tight before proceed with stream pressurization.
6) Verify if all equipment installed are adequate to the operating conditions, based on nameplate data attached in
each equipment.
7) Verify if SSV (slam shut valve) is in the closed position.
GASCAT SSV are supplied already adjusted, however, due of transport conditions and equipment
handling it can be changed.
So that, it is recommended to verify the set-point of SSV using (for example) external pneumatic source
directly in the actuator before proceed with stream pressurization.
DOMUS regulator is NOT supplied adjusted. It tends to preserve the life time of some internal parts. It
means that the pressure regulator must be adjusted previously before operation.
4.8.2 COMMISSIONING
Utilizing as reference the assembly layout presented in the item 4.7 proceed with the descriptive indicate for
commissioning of DOMUS HF pressure regulator, considering that the recommendations in the item 4.6.1 of this
manual were properly observed.
Such procedure considers the utilization of DOMUS with G30F pilot.
1) Close the vent valve.
As the blocking valves of the stream are closed utilize the vent valve to simulate a low flow and proceed with
regulator adjusting before regulating the stream.
2) Verify if the adjusting spring pilot is released (with no charge).
Releasing the adjusting spring assure that the regulator will remain closed when pressurized.
3) Reset the SSV (slam shut valve).
4) Open SLOW AND GRADUALLY the inlet block valve, or when there is a by-pass for the inlet valves in the
Skid utilize it to pressurize the stream.
5) At this stage, the inlet pressure will achieve the regulator inlet, therefore it will remain closed because of this
no pressure downstream.
6) Adjust the pilot turning clockwise the adjusting spring. Assisted by the outlet pressure gauge in the outlet
pressure adjust the pressure 58 psi (4 bar) above the desired set point.
For example, if the set point is 217 psig (15 bar) the pre-regulator shall adjust 275 psi (19 bar).
7) Adjust the G30F/G32F pilot turning clockwise the regulating spring. Do it slowly in order to admit low pressure
downstream the pressure regulator; utilize the pressure gauge in the pipe checking the increase in pressure
until the desired set point.
8) Open the vent valve around 20%, and verify if the pressure remain in the value adjusted.
