PIETRO FIORENTINI FE Series - 4 - DESCRIPTION AND OPERATION; General Description and Operation

27
SERIES FE
LOW-PRESSURE GAS REGULATOR | DESCRIPTION AND OPERATION | REV. 00
EN
Use, maintenance and warning manual
4 - DESCRIPTION AND OPERATION
4.1 - GENERAL DESCRIPTION
The equipment is a self-operated dual-stage low-pressure regulator suitable for gaseous uids such as:
• natural gas;
• GPL;
• non-corrosive gases.
The main elements of the equipment are specied in Tab. 4.13.:
Pos. Description Pos. Description
1
Inlet connections:
a: in-line
b: in a square pattern
7
Outlet connections:
a: in-line
b: in a square pattern
2
First stage regulation 8
Slam-shut valve for maximum downstream pres-
sure
3
Double stage regulation 9 Relief valve
4
Excess ow lock-up device reset button 10 Double stage regulation valve (3)
5
Reset knob of the slam-shut valve for maximum
downstream pressure
11 Excess ow lock-up device
6
Reset knob protection cap (5) - -
Tab. 4.13.
4
5
6
8
2
3
10
11
9
7b
7a
1b
1a
Upstream pressUre IntermedIate pressUre downstream pressUre
Fig. 4.1. FE (basic version) general description