Madas RG/2MCSH Manual Del Usuario página 15

3.3 - INSTALLATION IN PLACES WHERE THERE IS AN EXPLOSION HAZARD (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 establish 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 is not a source of specific hazards: in particular, under normal operating conditions, the regulator is expected to
emit flammable substances into the atmosphere only occasionally, and specifically:
The regulator may be dangerous when there are other devices nearby if the built-in relief valve is triggered or if the working
diaphragm (24) or the blocking diaphragm (14) break. If the diaphragm breaks, the regulator becomes a source of explosive
atmosphere emission of continuous grade and, as such, it may 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 taken so as to prevent the regulator from giving rise to 0 zones: for example, annually
check regular operation, possibility of changing the emission grade of the source or acting on the explosive substance discharge
by conveying it outwards. To do so, simply remove the dust caps (13) and (25) and connect a specific pipe (respectively, G
1/8 and G 1/4) conveyed to the outside (see example of installation in 3.4).
3.4 - GENERAL INSTALLATION EXAMPLES
EXAMPLE 1 (2MCSH... models)
1. Expansion joint/anti-vibration mount
2. Upstream ball valve
3. FM gas filter
4. OPSO series MVB/1 MAX shut-off valve
5. RG/2MCSH pressure regulator
1
2
Madas Technical Manual - 5|5.3b - REV. 0 of 2
8
3
4
Sep 2019
th
6. Ball valve downstream of the regulator
7. Vent valve
8. Relief valve MVS/1
9. Low pressure gauge and relevant button
10. High pressure gauge and relevant button
discharge in
open air
8
9
5
15
7
6
RG/2MCSH - RG/2MBHZ