Life Support: Centralized Flow Control Unit (CFCU)
Centralized Flow Control Unit (CFCU)
Precise oxygen flow
Low power
Built in test port for in-aircraft testing
Application:
The centralized flow control unit (CFCU) is an integral part of an airplane's gaseous passenger
oxygen system. The CFCU is an altitude sensing high flow pressure regulator that provides
precise oxygen flow to all passenger masks in the event of decompression.
The CFCU (part number B43680-1) has been designed and qualified as part of an ATA 35
certified oxygen system and is capable of supplying oxygen for up to 102 TSO C64a
passenger masks. The unit was designed for Lufthansa Tecknik and is in service aboard their
Boeing Business Jet conversions.
Features:
The CFCU is electrically actuated by a 28 VDC pulse and latches open to eliminate the need
for continuous power. A separate 28 VDC pulse is used to reset the unit to the standby mode.
The unit includes an outlet pressure relief valve that protects the downstream volume.
Pressure output from the CFCU is altitude compensated from 10,000 to 41,000 feet. The
CFCU has a built in test port that allows for in-aircraft system testing.
