Madas RG/2MB MIN Manual Del Usario página 14

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 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.
The regulator can be dangerous with respect to the presence of other equipment nearby only in the case of failure of the operating
diaphragm (6) and of the safety diaphragm (5) of the regulator or in the case of failure of the operating diaphragm (12) and of the
safety diaphragm (13) of the shut off: in both cases (and only in these cases), the regulator constitutes a source of emission of
explosive atmosphere of continuous degree and, as such, it can originate dangerous 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 (37) can be connected to the outside by removing the dust caps (4) and
(38). The threaded hole connection can be G 1/4 or G 3/8 (see instructions in fig. 1 and 2).
3.4 - GENERIC EXAMPLE OF AN INSTALLATION
1. M16/RM N.C. Manual reset solenoid valve
2. SM jerk ON/OFF valve
3. FM gas filter
4. RG/2MB MIN pressure regulator
with UPSO device
5. MVS/1 relief valve
external roof
10
11
1
* if the zone is ATEX classified follow the indications of 3.3
RG/2MB MIN - FRG/2MB MIN
6. Pressure gauge and relative button
7. Vent valve
8. Ball valve
9. Gas detector
10. SM remote jerk ON/OFF valve lever control
11. Expansion joint/anti-vibration mount
9
2
3
14
5
6
4
Madas Technical Manual - 4|4.3b - REV. 0 of 26
discharge in
open air
7
8
Feb 2019
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