Installation and Operation Manual
Argos - Pressure Regulating Valve
MI-23
Elaborado
Verificado / Aprovado
CSQ
Data
Revisão
Página
JJ
VBL
JM
13/02/19
07
15 de 32
4.0 - INSTALLATION
4.1 FILTER
We recommend the installation of a cartridge type filter, with 5 micra filtration degree, as close to the regulator inlet as
possible, without being joined flange to flange, because the filter installed immediately upstream of the regulator may
produce turbulence and cause disturbance in the pressure control of the regulator. Care in filter installation is essential for
the regulator proper operation, as any existing particles in the pipe may take lodge between the seat and the shutter,
damaging them and causing feedthrough.
4.2 CLEANING
Check the pipe cleaning before valve installation. We advise a complete purge of the line with nitrogen or compressed air.
4.3 FLOW DIRECTION AND SYSTEM INTEGRITY
Before proceed with installation it is necessary to verify if:
1) The equipment is with perfect conditions or have evidences of damage in function of handling during the
transportation; in case of damage do not install it before contacting GASCAT.
2) The space foresee for access and installation of equipment is adequate, including future maintenance.
3) The installation was designed to support the charge (weight) of equipment.
4) The inlet and outlet connections where the regulator will be installed are perfectly aligned.
5) All sensing line needed in the pipe downstream the equipment were supplied and are respecting the
recommended dimensions by the manufacturer.
6) It was foresee pressure gauge or other pressure indicator to allow correct setting during the commissioning and
operation.
7) It was foresee venting line between the pressure regulator and first slam shut to assist the operator during the
start up.
8) Flow direction of pressure regulator is in the adequate position.
4.4 SENSING LINE
The correct positioning of sensing line in the pipe is essential for correct working of pressure regulator, because of
this install the sensing line of pilot distant of 5 times the nominal pipe diameter in a stretch free of obstruction, in a pipe
size where the gas velocity do not exceed 25m/s (considering the lower outlet pressure and maximum flow).
To obtain better pneumatic signal, utilize tubings D.E ½” in stainless steel AISI 316 to connect the sensing line in
the process.
In order to avoid accumulate particles and condensates in the sensing lines it is recommended to install it with
inclination of 5%~10% to allow flow it to the main pipe.
Check the welded connections in the pipe to avoid it clogged, without any welding residue that can affect the
pneumatic signal.
Do not install insulating valves in the sensing line of pressure regulators.
The pressure regulator model Argos needs only one connection to the process per valve, that is the sensing line of
pilot, independently of system configuration (active / monitor, working monitor and only active regulator). Exception
only for flow limiter that have two extra connections in the orifice plate.
The loading and discharge sensing lines are connected directly in the body.
