Gnali Bocia - FGB Series - Gas Pressure Regulator

Direct acting spring loaded pressure regulator, controlled by a diaphragm and counter spring.

FG Series - Gas Pressure Regulator FG Series - Gas Pressure Regulator

Body size 1"
Connections Threaded EN 10226 or NPT
Flanged UNI (PN) - ANSI
Inlet pressure range BP-MP 0,5 ÷ 10 bar / 7,5÷145 psi TR 0,5 ÷ 20 bar / 7,5÷290 psi
Outlet pressure range 15 ÷ 4000 mbar / 0,21÷60 psi
Accuracy class AC% 5 / 10
Closing pressure class SG% up to 20
Design temperature -20 ÷ +60 °C
Ambient temperature -30 ÷ +60 °C
Design Pressure 20 bar / 290 psi
Acceptable gases Natural gas, town gas, lpg, nitrogen, air, any non-corrosive gas
Safety devices Built-in relief valve (standard) SSV/UPSO-OPSO shutt-off device (option)
Design standards-Approvals EN 334/EN 14382/Pressure Equipment Directive 2014/68/UE (PED)
CE-1370-PED-B-GBV 001-13-ITA-revB (Bureau Veritas) (CE mark)
On request FG-M and FGB-M monitor version


Product Information

The FG series pressure regulators are direct acting spring loaded regulator type, controlled by a diaphragm and counter spring. The balanced valve design ensures constant pressure setting when upstream pressure
varies. Designed to deliver high regulation accuracy, these devices are suitable for use with non-corrosive gases, previously filtered. The FG series pressure regulators are “top entry” design, which allows an easy
maintenance without removing the body from the pipeline.

The FGB version is with incorporated safety shut off device (SSV or Upso-Opso) against over and under outlet pressure.

FGB-M version is the monitor solution of FG regulator incorporating safety shut off device (SSV or Upso/Opso). The monitor is a safety pressure regulator which grant flow control in place of the main regulator if, in the event of failure of this latter, downstream pressure reach the monitor set-point. The regulators FG/FGB/FGB-M are CE marked and approved by Bureau Veritas under the Pressure Equipment Directive 2014/68/UE (PED) according with EN 334 / EN 14382.

The regulators are supplied with internal sensing line and presetted for external sensing line installed by the customer as option.

Main features

- Low/medium/high pressure versions
- High regulation accuracy
- High flow rate

- Spring loaded
- Fully balanced valve design
- EN 334 / EN 14382 compliance

- Threaded and flanged connections DN 25x25
- Compact design
- Easy maintenance (top entry design)

- Incorporated SSV (UPSO/OPSO) safety device (FGB and FGB-M version)
- Incorporated relief valve

- Incorporated antipumping device
- Incorporated silencer for noise reduction (option)
- Monitor version

Product DATASHEET - FGB Regulator