PIETRO FIORENTINI REVAL 182, Инструкция по эксплуатации и обслуживанию

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51
REV
AL 182
Use, maintenance and warning instructions
MEDIUM PRESSURE REGULATOR | DESCRIPTION AND OPERATION | REV. 00
EN
2
5
6
7
8
3
10
9
1
4
U
pstream pressUre
D
ownstream pressUre
Fig. 4.12. REVAL 182 with SB/82 incorporated slam-shut valve
OPERATION:
The tripping pressure acts on the control element of the control pressure switch (2), which is solidly connected to the
stem (5), and receives an antagonistic force through the springs due to maximum (7) and minimum (6) pressure tripping,
calibrated to the pre-set values.
The translation of the stem (5) causes the control device (8) of the mobile system to be released and, through the action
of the spring (9), the plug (1) to be shut off.
To reset the device, it is necessary to act on the lever (3) which:
• opens an internal bypass in the first section of the stroke allowing the upstream pressure to be transferred from the
inlet chamber to the outlet chamber of the regulator body (4), thereby rebalancing the pressure on the plug (1);
• re-couples the control device (8) of the mobile system.
NOTICE!
The release of the control device (8) of the mobile system can also be controlled manually by means of a
button (10).