PIETRO FIORENTINI NORVAL, Installation, Commisioning And Maintenance Instructions

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TECHNICAL MANUAL MT044
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4.3.1 CHARACTERISTICS
• Reduced dimensions;
• Easy maintenance;
• Can also be mounted on a normal regulator already installed.
4.3.2 NORVAL OPERATION WITH MONITOR FUNCTIONS
The NORVAL (fig.11) with monitor functions is a regulator which, compared with the normal version, has a
further mobile assembly balancing
device which guarantees greater
precision in the regulated pressure
and therefore an equally precise
pressure intervention value without
problems of interference with the
main regulator. Chamber A is
subject to the downstream
pressure.
Fig. 11b
4.3 NORVAL FUNCTIONING AS A MONITOR
The monitor is an emergency regulator whose function is to come into service instead of the main regulator when
failure of the latter causes the downstream pressure to reach the point set for monitor intervention.
PIETRO FIORENTINI has a solution for this emergency device for in-line installations.
Fig. 11a