Aperflux 851

Aperflux 851

The Aperflux 851 pilot-operated gas pressure regulator by Pietro Fiorentini is designed for filtered, non-corrosive gases. Used in high-pressure transmission and medium-pressure distribution networks, it is classified as Fail Open under European Standard EN 334.

Product Features

  • Accuracy class AC: up to 2.5
  • Nominal sizes DN: 1″, 2″, 3″, 4″, 6″, 8″, 10″
  • Lock-up pressure class SG: up to 10
  • Design pressure: up to 102 bar
  • Design temperature: from -20 °C to +60 °C (higher or lower temperatures on demand)
  • Connections: class 150, 300, 600 RF or RTJ according to ASME B16.5 or PN 16, 25, 40 according to ISO 7005
  • Minimum differential pressure: 0.5 bar, recommended > 2 bar
  • Range of downstream pressure Wd: from 0.8 to 74 bar, depending on the installed pilot
  • Inlet pressure range bpu: from 1.3 to 85 bar

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