Madas RG/2MCSH Manual Del Usuario página 17

• Close the downstream valve so as to close the regulator (the Pa value increases by the SG value to fully close the obturator);
• Check the tightness of the system's gaskets and check the internal/external tightness of the regulator, of the relief valve and
of the external sensor tube, if any;
• Slowly open the downstream valve and the shut-off valve;
• Check the operation of the regulator.
6.0 - CALIBRATION
The RG/2MCSH models are NOT fitted with safety shut offs (OPSO - UPSO).
Before carrying out the operations, make sure that the supplied spring/s is/are suitable for the desired Pa - OPSO - UPSO
and relief valve fields.
6.1 - Adjusting the maximum pressure shut off (OPSO - RG/2MBHZ... models)
• Unscrew the cap (10);
• Use the supplied spanner (28) to fully tighten the adjustment ring nut of the relief shut off (16);
• Start the system, reset the shut off device as indicated in 4.0 and make sure that there is no gas consumption (close the
applications downstream of the regulator);
• Use an auxiliary gas pressure to slowly increase the downstream pressure to the desired value and simultaneously, use the
spanner supplied (28) to loosen the ring nut (16) until the device is triggered (so as to avoid having to set the Pa again);
• Reset the system by following the correct procedure and ensure that the trigger value is that desired by repeating the release
step 2-3 times;
• If necessary, adjust the trigger setting by turning the ring nut (16) with the appropriate spanner (28).
6.2 - Adjusting the minimum pressure shut off (UPSO - RG/2MBHZ... models)
• Unscrew the cap (10);
• Use the supplied spanner (28) to loosen the adjustment ring nut of the minimum shut off (17) to the minimum;
• Start the system and reset the shut off device as described in 4.0;
• Reduce the downstream pressure to the desired trigger value;
• Use the supplied spanner (28) to tighten the adjustment ring nut (17) until the minimum pressure shut off is triggered.
• Reset the system by following the correct procedure and ensure that the trigger value is that desired by repeating the release
step 2-3 times;
• If necessary, adjust the trigger value by turning the ring nut (17) with the specific spanner (28);
6.3 - Adjusting the relief valve (Rv)
NOTE: The relief (if applicable) in these regulators is NOT differential, so the indicated range is the actual trigger range.
• Start the system and set the shut off as described in point 4.0;
• Slowly close the valve downstream of the regulator;
• Use the special screwdriver (see fig. 1, 2 and 3)to fully tighten the relief adjustment screw (26);
• Use auxiliary gas pressure to slowly increase the downstream pressure (Pa) up to the desired value. After that, loosen the
adjustment screw (26) until the relief valve is triggered;
• In this case, the relief valve is set to the desired value.
Madas Technical Manual - 5|5.3b - REV. 0 of 2
17
Sep 2019
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RG/2MCSH - RG/2MBHZ