IT
EN
FR
ES
17
Madas Technical Manual
- 4|4.2a - REV. 1 of 20
th
Feb 2020
FRG/2MBCL(Z-F-R-M) - FRG/2MBL(Z-F-R-M)
7.1 - CHECK THAT THE MAXIMUM PRESSURE SHUT OFF VALVE IS WORKING (OPSO)
Reset the shut off device and close the valve downstream of the regulator;
Method 1:
1. Loosen and remove caps (
27
) and (
10
);
2. Use the same tool (shown in fig. 1a and 2a) to press the nut (
26
) and slowly increase the downstream pressure until
the device is triggered;
3. Tighten the caps back to their original position and repeat the P2 setting steps (6.4);
Method 2:
Alternatively, use an auxiliary gas pressure to slowly increase the downstream pressure until the device is triggered (so as to
avoid having to set the P2 again).
7.2 - CHECK THAT THE MINIMUM PRESSURE SHUT OFF VALVE IS WORKING (UPSO)
• Reset the shut off device and close the ball valve upstream of the regulator;
• open the relief valve, downstream of the device, partially and slowly. As the outlet pressure decreases slowly it will cause the
minimum shut off to trigger at its setting value;
• Repeat the trigger step 2-3 times to make sure that the system functions correctly. Between one trigger and another, set the
downstream pressure back to the setting value.
7.3 - CHECK THE TIGHTNESS OF THE DEVICES (OPSO AND UPSO)
• Fully empty the downstream pipe section (wait a few seconds to allow it to empty completely). The downstream pressure
must remain at zero when the relief valve is closed.
7.4 - CHECK THAT THE RELIEF VALVE IS WORKING PROPERLY
• Start the system and set the shut off as described in point 4.0;
• Slowly close the valve downstream of the regulator;
• Loosen and remove the cap (
27
);
• Use an 8 mm socket spanner to press the adjustment nut (
26
) to increase the pressure P2 above the preset value, while
preventing the OPSO shut off from being triggered. Use a calibrated pressure gauge for the reading;
• Remove the socket spanner. The generated overpressure will be discharged outwards and the P2 will begin to decrease to
the relief valve setting value. Relief valve operation is verified;
• Close the cap (
27
);
• Open the relief valve to discharge the created overpressure;
• Close the relief valve (the regulator goes to the closing pressure) and open the ball valve downstream of the regulator.
8.0 - MAINTENANCE
• No maintenance operations need to be carried out inside the device. If operations must be carried out inside the
device (changing the spring, replacing the filter, etc.), it is advisable to contact the Technical Department. In any
case, before carrying out any dismantling operation on the device, make sure that there is no pressurised gas inside.
9.0 - TRANSPORT, STORAGE AND DISPOSAL
• During transport the material needs to be handled with care, avoiding any impact or vibrations to the device;
• If the product has any surface treatments (ex. painting, cataphoresis, etc) it must not be damaged during transport;
• The transport and storage temperatures must observe the values provided on the rating plate;
• If the device is not installed immediately after delivery it must be correctly placed in storage in a dry and clean place;
• In humid facilities, it is necessary to use driers or heating to avoid condensation;
• At the end of its service life, the product must be disposed of in compliance with the legislation in force in the country where
this operation is performed.
