OBIGGS for C27J [ Return towards  Military cargo aircrafts  ]

Air Liquide was selected to be fitted to the C27Js because it offered an effective and reliable air separation system associated with a highly innovative electro-pneumatic type of control.
Inert gas (nitrogen) is generated using polymer membranes for air separation. This technology, developed by the Air Liquide Group for industrial applications, has been adapted to the restrictive aeronautics environment, and has been fitted to planes and helicopters for close on 20 years.
Apart from the inert gas generation itself, DTA is also responsible for upstream filtration which is used to protect the air separation membranes from any potential impurities. AL also controls inert gas generation. Production is optimized as a function of flight phases and conditions using electronically controlled motor-driven valves. This high-speed precision technology is unique to this type of application.
DTA’s experience in the inerting field has also been of use in optimizing the supply of inert gas to the C27J tanks, supporting the plane maker in designing feeder lines and supplying related components (clack valves, gauged orifices, etc.).
Lastly, a control box installed in the cockpit allows the pilot to control inerting on his plane. This box, which communicates with the plane’s alarm manager, also allows the pilot to monitor in real time whether the system is operating smoothly.

A comprehensive provision
Far from confining itself just to air separation, Air Liquide provides the whole nitrogen production line, from upstream protection to supplying the gas to the tanks. Air Liquide is thus able to offer optimum inerting, perfectly adapted to the plane.

Optimized gas generation
The control system developed by Air Liquide is used to generate inert gas on demand and in an optimized way. The inerting system will thus consume the bare minimum of air at input, whatever the flight phase, thereby preventing any wastage of one of the key parameters on a plane.

Continuous monitoringIn the event of a malfunction upstream or in the core of the inerting system, the system is able not only to feed the information back to the pilot, but also to protect itself, thereby cutting down on maintenance and operating costs for the user.