Reflux 819
Pilot-operated gas pressure regulators

Reflux 819

The Reflux 819 is a pilot-controlled pressure regulator for medium and high pressure applications.
The Reflux 819 is normally a fail close regulator and  will close specifically under the following conditions:
•    The  main diaphragm breaks;
•    There is no feed  to the pilot loop.
This regulator is suitable for use with previously-filtered, non-corrosive gases.


Technical data
  • Design pressure
  • Design temperature
  • Minimum working differential pressure
  • Accuracy class
  • Closing pressure class SG
  • Flanging
  • Outlet pressure range of Wd
  • Available size DN
  • Maximum working differential pressure
  • Range of inlet pressure bpu
  • up to 1,450 PSIG
  • -10°C to +60°C (+14 to +140°F) (higher or lower temperatures on demand)
  • 7.25 PSIG
  • up to 1%
  • 5% to 1% depending on outlet pressure
  • 150-300-600 RF or RTJ according to ANSI B16.5 and PN 16 according to ISO 7005
  • 5 to 1,073 PSIG
  • 1"- 2"- 3"- 4"- 6"- 8"- 10"- 12"
  • 99,7
  • 11.6 to 1,450 PSIG

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Pietro Fiorentini is a global leader in designing and construction of components and systems for natural gas.

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