The Aperflux 851 is pilot-controlled pressure regulator for medium and high pressure applications.
Aperflux 851 is normally a fail open regulator and will open specifically under the following conditions:
• If the main diaphragm fails;
• If there is no feed to the pilot loop.
This regulator is suitable for use with previously-filtered, non-corrosive gases.
Minimum working differential pressure
Closing pressure class SG
Outlet pressure range of Wd
Available size DN
Maximum working differential pressure
Range of inlet pressure bpu
up to 19,6 bar
-20°C a +60°C (higher or lower temperatures on request)
0.5 bar - Recommended > 2 bar
up to 5
up to 10%
Class 150 RF according to ANSI B16.5 and PN16 according to ISO 7005
12 to 1,073 PSIG (depending on the installed pilot)