6
EN
1
2
3
4
5
6
7
8
piping
application
3.3 - GENERIC EXAMPLE OF AN INSTALLATION
1. Expansion joint/anti-vibration mount
2. Upstream ball valve
3. FRG/2MCS9 pressure regulator filter
4. Ball valve downstream of the regulator
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 (
17
). 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, simply remove the dust cap (
18
) by connecting the specific pipe (G
1/4) conveyed to the outside (see example of installation in 3.3).
discharge in
open air
discharge in
open air
G 1/8
G 1/4
Ø ext. min 8mm
Ø int. min 6mm
NOTE: The 5DN pipe connection can only be carried out on STANDARD versions (2MB).
5 DN
external roof
5. Vent valve
6. Relief valve MVS/1
7. Low pressure gauge and relative button
8. High pressure gauge and relative button
