ES
FR
EN
IT
12
Madas Technical Manual
- 7|7.3 - REV. 0 of 1
st
Apr 2019
MVB/1 MIN
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.
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
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
1
2
3
4
5
6
8
9
7
7
10
11
piping
application
discharge in open air
internal thermal unit
non-hazardous ventilated zone*
external roof
12
* if the zone is ATEX classified follow the indications of 3.3
5 DN
