Excellent turn down ratio & easy maintenance with the Aperflux 851

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Aperflux 851 is a pilot-controlled pressure regulator for medium and high-pressure applications. Aperflux 851 is normally a failed open regulator that will open under the following conditions:

  • breakage of main diaphragm
  • lack of pressure feeding to the pilot loop

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

Aperflux 851 Specifications

Technical data
Value
Accuracy Class
Up to 1%
Available Size
1″- 2″- 3″- 4″- 6″- 8″- 10″
Closing Pressure Class SG
From 5% to 1.5%
Design Pressure
Up to 1,250 PSIG (8,618 kPa)
Design Temperature
-40°C to 60 °C (-40°F to 140 °F) with a carbon steel body
Flanging
Class 150-300-600 RF or RTJ according to ANSI B16.5 and PN16 according to ISO 7005
Minimum Working Differential Pressure
7,25 PSIG (50 kPa) – Recommended > 30 PSIG (200 kPa)
Outlet Pressure Range of Wd
12 to 1,073 PSIG (80 to 7,400 kPa)
Range of Inlet Pressure bpe
18.8 to 1,230 PSIG (130 to 8,500 kPa)

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