Diluter control lever in 100% OXYGEN
gaseous oxygen and then delivers it to the crew. The
oxygen source of this system is a supply of LOX stored
position
in a 10-lilter converter. System pressure is maintained
Supply valve control lever in OFF position
at 75 to 110 psi by a pressure control valve and a
Regulator and surrounding area free of dirt and
pressure relief valve.
hydrocarbons
Through a process of controlled evaporation within
Delivery hose and connector for cuts, fraying,
the converter assembly, LOX is converted to gaseous
oxygen as required by the occupant of the aircraft. The
kinking, hydrocarbons, and general condition
oxygen is delivered to the pilot after being warmed to a
If discrepancies are found or suspected, mainte-
safe breathing temperature in the heat exchanger. The
nance control should be notified. Regulators that do not
flow of oxygen is controlled in the cockpit by the
pass inspection and cannot be repaired in the aircraft
shutoff valve.
are removed and replaced by ready-for-issue (RFI)
The units that make up the converter assembly
regulators. Non-RFI regulators are forwarded to the
control the major part of the operation of the LOX
nearest maintenance activity having repair capability.
system automatically. The LOX converter has three
sequences of operation--fill, buildup, and supply (fig.
SYSTEM OPERATION
7-17). In the supply sequence, the converter alternates
The LOX system shown in figure 7-7 is an example
between the economy and demand modes of operation.
of a typical system. This system converts LOX to
Figure 7-17.--Liquid oxygen converter operation.
7-18
