Based on a hollow fiber separation process, the OBIGGS allows to produce during the mission the flow of Nitrogen Enriched Air (NEA) requested to protect the aircraft. Part of the oxygen contained in the fuel tank is replaced by Nitrogen, keeping the vapours non-flammable.
The OBIGGS includes a filtration chain, a pressure & temperature controller, an oxygen sensor and air separation modules. Depending on the applications, it can integrate a Temperature Management System to condition the bleed air. Compressed air is directly tapped an aircraft air circuit and transformed into NEA that is directly distributed in the fuel tanks.
15-years experience in fuel tanks explosion reduction enables Air Liquide to support the customer also for the design the distribution system: Inerting modelling, piping sizing, NEA injection location, supply of distribution components. The use of the OBIGGS does not need any calibration or logistic operation before the flight. By means of the control of a selected set of signals generated by the OBIGGS, the crew is permanently aware of the status of the equipment.
< 35 kg
< 10 kg
up to 2 lb/min
up to 0,2 lb/min
up to 1 % O2
up to 4 % O2
Fast and accurate regulation of the gas
Flexible and simple integration
Compact lightweight system
No calibration nor logistic
Control signals to be aware permanently of the operational status of the equipment
Reduced schedule maintenance
Temperature Management System allowing to use bleed air with temperatures up to 400°C
Full Air Liquide support for OBIGGS integration and gas distribution design
Key technical charateristics
Separation by MEDAL hollow fibers membrane
Integrated controller including a pressure regulator, A shut-off valve, a flow regulator and an oxygen analyser
Qualified according to MIL-STD standards
Alenia C27J military cargo aircraft
CASA-EADS C295 military cargo aircraft
Aero Vodochody L159 training / fighter aircraft
As part of an OBIGGS, the oxygen analyzer ensures that the system is in good working order. It analyzes the oxygen-depleted gas and sends an electrical signal reflecting the quantity of oxygen as a percentage or in partial pressure. The O2 analyzer is fitted with a zirconium oxide sensor to ensure its precision and reliability. It can operate at a wide range of pressures, from a few millibars to several bars and temperatures of up to 300°C.