Reflux 819/FO
Pilot-operated gas pressure regulators

Reflux 819/FO

The Reflux 819/FO is a pilot-controlled pressure regulator for medium and high pressure applications. The Reflux 819/FO is a fail open regulator i.e. it opens if: 
•    The  main diaphragm fails;
•    There is no feed to the pilot circuit.
These regulators are suitable for use with pre-filtered, non-corrosive gases.

Features

Technical data
  • 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
Value
  • -10°C to +60°C
  • 2 bar when used alone; 0,5 bar when used in combination with a Reflux 819 FC monitor
  • up to 1%
  • from 5% to 1% depending on outlet pressure
  • class 150-300-600 RF or RTJ according to ANSI B16.5 and PN 16 according to ISO 7005
  • 1 to 74 bar
  • 1", 2", 3", 4", 6", 8", 10"
  • 99 bar
  • 3 to 102 bar

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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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