Installation, Operation and Maintenance Manual
Pressure Regulating Valve – Model Ares N
MI–42
Prepared by
Verified by/ Approved by
CSQ
Date
Revision
Page
José Junior
Vanízio Lizo
Jamerson
24/03/17
02
14 of 21
15) If the scenario is as above, we do not recommend to increased the load on spring of the pressure regulator in
order to achieve the desired output pressure, because in this case the shutting pressure will change to a higher
value, which may coincide with the set points of other devices of the line.
4.5.3 THE BACK-UP LINE SET-UP
When the regulator is installed in a back-up line, we recommend that the procedure given in 4.6.2 be repeated, but
this pressure regulator setpoint should be adjusted for a pressure 15% - 20% lower than the set point of the valve
in operation.
After doing so, open
SLOW AND GRADUALLY
the outlet shut-off valve so that the downstream pressure of the
back-up span regulator equalizes with the pressure already in operation. The back-up regulator will remain shut.
To make the regulator of the reserve span assume regulation, slowly press the regulation spring clockwise until
the set point of the regulator reaches a value higher than the set point of the line in operation, thus the reserve
regulator will open slowly and assume operation.
It is important that the two regulators remain with a set point difference of at least 5% - 10%, so that there is no set
point overlap causing a competition between the two lines, i.e., at one instant one regulator opens, at another
instant the reserve regulator opens, promoting inaccuracy in regulation.
4.5.4 LIST OF RECOMMENDED TOOLS
To carry out commissioning set point adjustments and start-up of the GASCAT’s regulators model ARES N it is
required only the use of a special tool for setting up the regulator and the SSV G10 adjustment springs.
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