67
SERIES FE
LOW-PRESSURE GAS REGULATOR | FUNCTIONAL CHECKS | REV. 00
EN
Use, maintenance and warning manual
Step Action
4c
Checking the slam-shut device for tripping due
to maximum downstream pressure:
1. open the external pressure source by increasing
the pressure by approximately:
• 2 mbar/s for the BP version;
• 5 mbar/s for the TR version;
until the slam-shut device trips due to maximum pres-
sure when the reset knob clicks;
2. check that the tripping value of the slam-shut de-
vice is ± 15% with respect to the value indicated
on the nameplate applied (pdso).
NOTE!
If the pressure increase is difcult due to the
opening of the relief valve, it is possible to
partially plug the discharge conveyor (A) on
the second stage lid with a nger to allow
the pressure to increase downstream of the
gearbox.
A
5 Reset the slam-shut device for maximum downstream pressure by pulling the reset knob.
6 Disconnect the external pressure source outlet.
7 Close the downstream pressure outlet (Step 3) checking that there are no leaks.
8 Open the shut-off valve closed at Step 1.
Tab. 8.44.
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