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3.2 - INSTALLATION (see example in 3.4)
• Assemble the device by screwing it, with the due seals, onto the plant with pipes and/or fittings whose threads are consistent
with the connection being attached.
• Do not use the neck of the top cover (3) as a lever to help you screw it on, but only use the specific tool;
• The arrow, shown on the body (5) of the device, needs to be pointing towards the application;
• The regulator is normally positioned before the application. Previously evaluate the possibility of installing the regulator as
shown in the installation example in 3.4, namely in an optimal position pos.
• Should this not be possible, the following factors must be considered:
1. if installed as shown in pos.
2. if installed as shown in pos.
if installed in the optimal position
3. if installed as shown in pos.
regulator that protects it from debris that could enter from downstream from above (due to gravity);
Connections in line
a
b
• During installation, avoid debris or metal residues from getting into the device;
• To guarantee mechanical tension-free assembly, we recommend using compensating joints, which also adjust to the pipe's
thermal expansion;
• If the device is to be installed in a gas train, it is the installer's responsibility to provide suitable or correctly sized supports
to hold and secure the assembly. Never, for any reason whatsoever, leave the weight of the gas train only on the connections
(threaded or flanged) of the individual devices;
• In any case, after the installation check the tightness of the system, avoiding to subject the membrane of the regulator
(therefore, the downstream pipe section) to a pressure higher than 200 mbar;
3.3 - INSTALLATION IN PLACES WHERE THERE IS THE RISK OF EXPLOSION (DIRECTIVE 2014/34/EU)
The regulator complies with Directive 2014/34/EU as a group II equipment, category 2G and as group II equipment, category
2D; consequently, it is suited for installation in zones 1 and 21 (besides zones 2 and 22) as classified in Annex I of Directive
99/92/EC.
The regulator is not suited for use in zones 0 and 20 as defined in the aforementioned Directive 99/92/EC.
To determine the qualification and size of the danger zones, please refer to standard IEC EN 60079-10-1.
If the device is installed and serviced in full compliance with all the conditions and technical instructions provided in this
document, it does not pose a source of specific hazards: in particular, under normal operating conditions, the regulator emits a
flammable substance into the atmosphere ONLY if both the working membrane (4) and the safety membrane (13) malfunction:
in which case (and only if so), the regulator constitutes a source of emission of explosive atmosphere of continuous degree
and, as such, it can generate danger zones 0, as defined in Directive 99/92/EC.
In particularly critical installation conditions (unattended areas, poor maintenance or poor ventilation) and especially if there
are potential sources of ignition and/or hazardous equipment near the regulator in regular operation, as they may generate
electric arcs or sparks, a preliminary assessment of the compatibility between the regulator and such equipment must be
carried out.
In any case, every useful precaution must be adopted so as to prevent the regulator from generating zones 0: for example,
annually verify regular operation, possibility of changing the degree of emission of the source or intervening on the external
explosive substance discharge. For this purpose the threaded hole of the top cover (3) can be connected to the outside (using
appropriate fittings and pipes) by removing the dust cap (14).
Madas Technical Manual - REV. 0 of 10
b
the maximum P2 value declared on the rating plate could be less by a few mbar.
c
the life span of the product could be shorter than the duration that could be obtained
a
;
, besides that indicated for pos.
d
c
d
May 2018
th
a
(see figures below);
c
it is recommended to install a filter after the
90° connections (closed line input)
a
b
11
c
d
RG/2MT...X - FRG/2MT...X
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