PIETRO FIORENTINI FE Series Manual page 56

If it is necessary to change the calibration values, proceed as indicated in Tab. 6.35. to increase or decrease the operating
pressure:
Step Action
1 Remove the upper cap (A) of the regulator.
Turn the ring nut (B) clockwise
2 • to increase the downstream pressure;
• anticlockwise to decrease the downstream pressure.
3 Put the upper cap (A) of the regulator back in place.
4 Remove the cap of the slam-shut device (C).
Turn the ring nut (D):
• clockwise to increase the slam-shut valve tripping pressure;
5
• anti-clockwise to decrease the slam-shut valve tripping pres-
sure.
6
Put the cap of the slam-shut device (C) back in place.
NOTE!
Minimum calibration variations of ± 10% with respect to the value shown on the nameplate (see paragraph
2.8 "Identification plates applied") can be performed only by adhering to the spring ranges specified in the
tables in chapter 10 ("Calibration tables").
NOTE!
The relief valve pressure does not need to be adjusted.
WARNING!
Contact PIETRO FIORENTINI S.p.A. for any further need.
Do not make any unauthorised changes to the equipment without the approval of
PIETRO FIORENTINI S.p.A.
LOW-PRESSURE GAS REGULATOR
EN
Use, maintenance and warning manual
A
Fig. 6.11. Operating pressure regulation
| INSTALLATION | REV. 00
Necessary equipment
-
27 mm tubular socket wrench
-
-
13 mm tubular socket wrench
-
B
D
C
Tab. 6.35.
56