PIETRO FIORENTINI FE Series - Operation

28
SERIES FE
EN
LOW-PRESSURE GAS REGULATOR | DESCRIPTION AND OPERATION | REV. 00
Use, maintenance and warning manual
4.2 - OPERATION
SERIES FE equipment consists of regulators featuring:
• self-operation;
• low pressure suitability;
• a dual regulation stage.
Tab. 4.14. describes the operation of the equipment in a simplied manner:
Step Description
1 The upstream pressure (A) feeds the regulator.
2 The rst regulation stage (B) determines the rst pressure reduction.
3
Intermediate pressure is adjusted by the second regulation stage (C) to the value of the downstream pressure
(D) required by the user.
4
In the event of faults, the safety devices will trip:
• relief valve (E);
• excess ow lock-up device (F);
• slam-shut valve for maximum downstream pressure (G).
Tab. 4.14.
C
D
D
A
A
E
G
F
B
Upstream pressUre IntermedIate pressUre downstream pressUre
Fig. 4.2. Operation SERIES FE