TECHNICAL MANUAL MT103
17
3.1.2 INSTALLATION WITH ON/OFF VALVE (FIG. 6)
1) Close the on-off valve 16.
2) Connect a controlled auxiliary pressure to the nipple 17 and increase it slowly up to the value envisaged for
intervention.
3) Check the intervention of the relief valve and adjust if necessary by turning the adjustament plug 13
appropriately (clockwise to increase and anticlockwise to decrease).
3.2 ACCELERATOR
An accelerator (fig. 7) is installed on the PM/819 icorporated monitor and on the REFLUX 819 regulator (use as
in-line monitor) to speed up their intervention in the event of failure of the active regulator (racommended when
used safety accessory according to Directive 97/23/EC “PED”).
On the basis of a pressure signal from downstream this device discharges the gas into the monitor's motorization
chamber into the atmosphere, thereby permitting rapid intervention. The set point of the accelerator must
obviously be higher than that of the monitor.
Setting is made by turning the adjustment screw 17
, clockwise to increase the value, anticlockwise to reduce it.
M/A range of intervention Who: 0,3 to 43 bar
Fig. 7
vent
vent
Accelerator M/A
Fig. 6
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