Pietro FiorentiniPietro Fiorentini Reflux 819 Regulator

Pietro Fiorentini Reflux 819 Regulator

Reflux 819 is a pilot-controlled pressure regulator for medium and high pressure applications.

Reflux 819 is normally a fail to close regulator and specifically will close under the following conditions:

  • Breakage of main diaphragm
  • Lack of feeding to the pilot loop

This regulator is suitable for use with previously filtered, non-corrosive gases.

The Reflux 819 is modular in design and allows retrofitting of a monitor PM/819, slam shut valve, and/or silencer in the same body. The Reflux 819 regulator is truly a “top entry design” which allows for easy maintenance and retrofitting options in the field. The unique dynamic balancing system ensures an outstanding turn-down ratio combined with an extremely accurate outlet pressure control.

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Pietro Fiorentini Reflux 819 Regulator

> Design pressure: up to 1450 PSIG (100 bar)

> Design temperature: -10°C to + 60°C (+14 to + 140 °F) (-20°C to + 60°C + 4 to + 140°F on request)

> Ambient temperature: -10°C to + 60°C (+14 to + 140°F) (-20°C to + 60°C + 4 to + 140°F on request)

> Range of inlet pressure bpe: 11.6 to 1450 PSIG (0,8 to 100 bar)

> Range of outlet pressure Wh: 5 to 1073 PSIG (0,3 to 74 bar) depending on installed pilot

> Minimum working differential pressure: 7.25 PSIG (0,5 bar)

> Accuracy class AC: up to 1%

> Closing pressure class SG: from 5% to 1% depending on outlet pressure

> Available size DN: 1” -2” -3” -4” -6” -8” -10” > Flanging: class 150-300-600 RF or RTJ according to ANSI B16.5 and PN16 according to ISO 7005.

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

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