First Start-Up - Madas RG/2MBLZ Manual Del Usuario

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 caps (12) and (24) by connecting the specific
pipe (respectively, G 3/8 and G 1/8) conveyed to the outside (see installation example in 3.4).
3.4 - GENERAL EXAMPLE OF INSTALLATION
1. Expansion joint/anti-vibration mount
2. Upstream ball valve
3. RG/2MBLZ pressure regulator
4. Ball valve downstream of the regulator
1
2
* if the zone is ATEX classified follow the indications of 3.3
4.0 - MANUAL RESET
• Make sure that all valves and downstream taps are closed;
• Unscrew the cap (11);
• Lightly press the reset pin (29), wait a few moments for the pressure to balance and then fully press the reset pin (29);
• Hold down the reset pin (29), slowly open the valve downstream of the regulator;
• Release the reset pin (29), and pull it downwards slowly to prevent it from touching the centre pin (14);
• Then tighten the cap (11) back in the initial position.

5.0 - FIRST START-UP

Before commissioning, verify that:
• all of the instructions on the rating plate, including the direction of flow, are observed;
• the holes of the dust caps (12) and (24) are not clogged (regulator and shut off);
• IMPORTANT: The leak test of the piping must be performed without subjecting the diaphragm of the regulator
(therefore, the downstream pipe section) to a pressure higher than 300 mbar (for reinforced diaphragm 1.5 times
the regulator setting pressure). Use special manual gas closing devices to avoid damaging the regulator;
• The pressurisation manoeuvre of the equipment must be carried out very slowly so as to avoid possible damage.
NOTE: under no circumstances should a blind cap be installed in place of dust caps (12) and (24) as the
regulator and/or the safety shut offs may not work;
• Close the ball valve downstream of the regulator and partially open the downstream relief valve;
• Slowly open the upstream shut-off devices;
RG/2MBLZ
discharge in open air
8
3
14
5. Vent valve
6. MVS/1 relief valve
7. Low pressure gauge and relative button
8. High pressure gauge and relative button
discharge in open air
6
7
Ø ext. min 8mm
Ø int. min 6mm
Madas Technical Manual - 4|4.2b - REV. 0 of 1
5
4
Apr 2019
st