Madas MVB/1 MIN Mode D'emploi page 12

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. UPSO series MVB/1 MIN shut-off valve
5. RG/2MC pressure regulator
6. MVS/1 relief valve
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* if the zone is ATEX classified follow the indications of 3.3
4.0 - MANUAL RESET
To reset the shut-off valve:
• Slowly open the upstream shut-off devices.
• Close the flow downstream of the valve in order to balance the pressure between upstream and downstream when opening.
DN 20 - DN 50: (see fig. 1)
• Unscrew the reset knob and protection (1), turn it over and tighten the threaded hole "A" to the reset pin (17);
• Pull the reset knob (1) upwards and wait a few seconds for the pressure upstream and downstream of the valve to stabilise.
Next pull the reset knob upwards (1) until it hooks;
• Retighten the knob (1) to the initial position.
DN 65 - DN 150: (see fig. 2)
• Pull the reset knob (1) upwards and wait a few seconds for the pressure upstream and downstream of the valve to stabilise;
• Next pull the reset knob upwards (1) until it hooks;
NOTE (for all versions): If during the first reset attempt the valve remains open, try to decrease the calibration value of
the block pressure, loosening the UPSO adjustment screw a few turns (11), after this repeat the reset procedure.
MVB/1 MIN
7. Pressure gauge and relative button
8. Vent valve
9. Ball valve
10. Gas detector
11. SM remote jerk ON/OFF valve lever control
12. Expansion joint/anti-vibration mount
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Madas Technical Manual - 7|7.3 - REV. 0 of 1
discharge in open air
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Apr 2019
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