Mod.

FB
Double stage low-medium
Pressure self-driven regulators
Regulators FB

The FB series of two stage self-driven spring loaded regulators are widely used in both civil and industrial installations
using Natural Gas, LPG and other non corrosive gases.
They are designed for direct installation to a gas meter and for use in general pipeline work. They can be mounted in
any position provided they are protected from weather. Where the installation is in an enclosed area, the internal relief
vent can be piped to outside. Simple installation procedure.
The regulators are manufactured according to UNI 8827.

Options
Inlet pressure (Pu)

Intermediate pressure

Outlet pressure (Pd)

Inlet test point Inlet test point Inviolable plug

Type Peterson Type Ø 7,7x0,794

FB FB FB
with inlet test point version with 2 outlet with outlet test point
connections
 Dimensions

G 1/8"
ISO 228/1
∅112 Connection
Configuration

98 ± 1.5 FB L FB U
ISO 228/1
G 1/2"

G 1"
ISO 228/1

41 FB S FB Q
54,3 C
D

G 1/2" G 3/4"
ISO 228/1 ISO 228/1
15 76 56 80 FB T
91 25.5
For dimension A-B-C-D depending
116.5 on selected connections.
A B

Weight
1,4 ÷ 2 Kg

Materials
Body - ZAMAK 3 UNI EN 1774
Cover - ZAMAK 3 UNI EN 1774
External treatments
Polyetilene coating on request

Main features Safety devices and accessories

> Inlet pressure range: bpu 0.15÷8.6 bar - bpu 2.2÷72.5 Psi > Built-in 100 µm inlet filter with an area of 500 mm2 (0.775
> Max allowable pressure: PS 8.6 bar - PS 124.7 Psi inch2).
> Outlet pressure range Wd: 3÷180 mbar - 5.2÷72.3” wc > Over pressure shut-off device (OPSO).
> Over pressure shut - off setting range: > Under pressure shut-off device (UPSO).
Wd OPSO: 35÷300 mbar - Wd OPSO: 14÷120.5” wc > Excess flow valve.
Wd UPSO: 8÷80 mbar - Wd UPSO: 3.2÷32.1” wc > Safety shut-off device for lack of feeding (UPSO).
> Accuracy class: AC 5/10% > Manual reset of safety shutoff device only.
> Lock up pressure class: SG 25% Max > Relief valve.
> Temperature class: 2 (-20°C +60°C) - (-68°F +140°F) UPON REQUEST
> Response time: lower than 3 sec. > Inlet and outlet pressure test point.
> With inlet valve - (without OPSO).
> Without OPSO - (without UPSO).

REQUIRED MINIMUM Inlet

MODEL Nominal CAPACITY
pressure bar (Psi)
FB6 6 (Stm3/hG.N.) Pd + 0.15
FB10 10 (Stm3/hG.N.) Pd + 0.2 For complete technical details
FB25 25 (Stm3/hG.N.) Pd + 0.3 and for the complete set
FBS 50 (Stm3/hG.N.) Pd + 1,0 of option refer to the online
configurator
www.fioxchange.com/cmr

Azote flow rate: multiply the value in the table Stm3/h G.N. x 0.789
Pietro Fiorentini Solutions

Gas meters Governors Solenoid valves

Pietro Fiorentini S.p.A. Tel. +39 0444 968.511

via E.Fermi 8/10 Fax. +39 0444 960.468
I-36057 Arcugnano (VI) Italy

The data are not binding. We reserve the

right to make eventual cheanges without
prior notice.

CT-s 571-E July11

www.fiorentini.com