Madas RG/2MCS Manual Del Usuario página 15

3.2 - INSTALLATION (see examples in 3.4)
• Assemble the device by flanging it, with the due seals, onto the plant with pipes whose flanges are consistent with the
connection being attached. The gaskets must be free from defects and must be centred between the flanges;
• If, after installing the gaskets, there is still too much space in between, do not try to reduce said gap by excessively tightening the bolts
of the device;
• The arrow, shown on the body (5) of the device, needs to be pointing towards the application;
• Insert the relative washers inside the bolts in order to prevent damage to the flanges during the
tightening stage;
• When tightening, be careful not to "pinch" or damage the gasket;
• Tighten the nuts or bolts gradually, in a "cross" pattern
(see the example alongside);
• Tighten them, first by 30%, then by 60% and finally 100% of the maximum torque (see the example
alongside, according to EN 13611);
• Tighten each nut and bolt again clockwise at least once, until the maximum torque
has been achieved uniformly;
• The regulator is normally positioned before the application. It can be installed
in any position even if the installation shown in 3.4 (installation examples) is preferred. A pressure test nipple (12) can be found
outside the regulator, downstream from it, to control the regulation pressure (Pa);
• It is necessary, using the appropriate fitting (4), to connect the downstream pulse outlet of the regulator (see installation
examples) via a special pipe;
• Drain the relief valve (if any) outwards (as shown in 3.4). To do so, in the piloted 2MCS version (see fig.2), it is necessary to remove
the dust cap (32);
• It is always recommended to install a compensation joint;
• 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 ramp, it is the installer's responsibility to provide suitable supports or correctly sized
supports, to properly hold and secure the assembly. Never, for any reason whatsoever, leave the weight of the ramp only on
the connections (threaded or flanged) of the individual devices;
• In any case, after installation check the tightness of the system, without subjecting the diaphragm of the regulator (therefore,
the downstream pipe section) to a pressure higher than 300 mbar (valid only for versions with standard working diaphragm).
For versions with reinforced diaphragm, check the tightness with a pressure equal to 1.5 times the regulator setting pressure.
3.3 - INSTALLATION IN PLACES WHERE THERE IS THE RISK OF EXPLOSION
(DIRECTIVE 2014/34/EU)
The regulator complies with Directive 2014/34/EU (formerly 94/9/EC) as group II equipment, category 2G and as group II
equipment, category 2D; consequently, it is suited for installation in zones 1 and 21 (in addition to 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 installed and subject to maintenance in full compliance with all conditions and technical instructions provided in this manual,
the device does not pose a source of specific hazards: in particular, under conditions of normal operation, the regulator is
expected to emit a flammable substance into the atmosphere only occasionally, and specifically:
The regulator can be dangerous with respect to the presence of other devices nearby if the integrated relief valve is triggered
or if the working diaphragm (16) or the blocking diaphragm (30) fails. If the diaphragm fails, the regulator becomes a source
of explosive atmosphere emission of continuous degree and, as such, it can generate hazardous areas 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 explosive
substance discharge by directing it outwards. To do so, where present, remove the dust caps (31) and (32) by connecting
the specific pipe (respectively, G 3/4 and G 1/8) conveying it to the outside (see installation examples in 3.4).
Madas Technical Manual - 5|5.2b - REV. 0 of 2
15
Sep 2019
th
Diameter DN 65 DN 80
Max. torque (N.m) 50
RG/2MCS - RG/2MBZ
DN 100
50 80