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.
Available size DN
Closing pressure class SG
Maximum working differential pressure
Minimum working differential pressure
Outlet pressure range of Wd
Range of inlet pressure bpu
up to 5
1", 2", 3", 4", 6", 8", 10"
up to 10%
up to 19,6 bar
-20°C a +60°C (higher or lower temperatures on request)
Class 150 RF according to ANSI B16.5 and PN16 according to ISO 7005
0.5 bar - Recommended > 2 bar
12 to 1,073 PSIG (depending on the installed pilot)