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
4 of 21
Depending on the regulator type, its valve may be positioned fully open. Consequently, when putting a regulator in
operation the shutoff valves shall be opened slowly, so that the regulator valve can assume its regulating position. If the
shutoff valves are quickly opened, the upstream pressure can pass through the regulator and over-pressurize the
downstream section of the main line.
All regulators, etc. shall operate with the regulation spring specified by the manufacturer. This is particularly important
when operating relief valves or shutoff valves, since incorrect springs may prevent a relief valve to open and a shutoff valve
to close.
Precautions shall be taken to prevent water inlet through breathing and ventilation openings.
1.2.4 MAINTENANCE
Regulators and valves contain gases under pressure, sometimes at a much higher pressure than the atmospheric
pressure. Before attempting to investigate a problem, or perform maintenance work on an equipment, it must be safely
depressurized. Furthermore, as many gases may be flammable, toxic, corrosive, or hazardous, it may be necessary to
purge the system with an inert gas, such as nitrogen. Special precautions are required for operation with gases such as
oxygen or hydrogen chloride, and the user must ensure that proper procedures are implemented.
Eventually, it is not enough to isolate the high-pressure device, since high pressure can be retained downstream of the
isolation valves. Do not try to remove caps, plugs, etc, before the device is properly released. Even so, it is wise to consider
that high-pressure gas may be trapped when removing covers and plugs.
Most regulators use spiral springs as the charging device. It is important to reduce these springs loading by moving
their pressing plates backwards as much as possible. In some cases, the spring may contain some residual load, even
when it is relaxed to the limits of its housing.
2.0 INTRODUCTION
2.1 SCOPE
This instruction manual intends to provide information on the installation, operation and maintenance of pressure
regulators model “ARES N”, manufactured by GASCAT.
2.2 DESCRIPTION
The pressure regulator series ARES N is self-operated type, designed for gases distribution with low pressure, for
commercial and industrial applications, with main characteristics easy operation and maintenance.
2.3 SPECIFICATIONS
2.3.1 AVAILABLE CONFIGURATIONS
ARES N: Pressure regulator . self-operated, opens on a failure.
ARES N WITH EMBEDED SSV: Pressure regulator self-operated, with embedded automatic bloking valve for
overpressure.
2.3.2 AVAILABLE CONNECTIONS
ND
CONNECTIONS
3/4"
NPT-F according to ANSI B2.1 or BSP DIN ISSO
228
1”
NPT-F according to ANSI B2.1, BSP DIN ISSO 228
or FLANGE 150#RF ASME B16.5
2.3.3 TEMPERATURE LIMITS