Lib
er
at
ors
Equipment Description
III
The CAIRE Liberator® is the stationary component of the
Liberator/Portable supplementary oxygen system. The Liberator
incorporates a stainless steel cryogenic container with the valves,
plumbing, and associated hardware required to deliver gaseous
oxygen to the patient at near ambient temperature.
The Liberator is comprised of four major assemblies, grouped
according to function.
1.
Cryogenic Container
– This assembly is a double walled,
vacuum insulated dewar for storing liquid oxygen (LOX) at
approximately -173°C (-280° F). The inner vessel is designed
to safely hold liquid oxygen and is protected from over pres-
surization by the primary relief valve. Vacuum insulation
between the inner and outer vessel keeps outside heat from
causing the cold liquid inside to evaporate.
2.
Breathing Circuit
– This circuit consists of the manifold as-
sembly, fixed orifice rotary flow control valve (FCV), breath-
ing coil, and warming coil. It withdraws liquid oxygen from
the cryogenic container, warms it to near ambient tempera-
ture, and regulates the flow of oxygen gas to the patient. Any
water that condenses on the cold coils is routed into the con-
densate bottle. An economizer regulator is utilized to con-
serve LOX by drawing oxygen head gas into the breathing
circuit.
3.
Shroud Assembly
– The shroud assembly houses and pro-
tects the breathing circuit and liquid level meter. Labels list-
ing safety information and patient operating instructions are
affixed to the side of the shroud.
4.
Liquid Level Meter
– This system uses a capacitance probe
and an electronic (LED) readout to measure and display the
LOX level by pressing the onboard operate button.
An optional roller base can be provided to help move
the
Liberator.
For Liberators manufactured before 2006, the serial number
was ten digits. The first three digits represented C
AIRE
specific information, followed by two digits signifying the
year of manufacture, followed by a two digit number to digit
number to signify the week of the year that the unit was
manufactured and ends with three digits signifying the unit's
production number for that week.
* For Top Fill or Dual Models Only
FIGURE 1:
Liberator Components
Serial Number Information
Liberators Technical Service Manual • PN 13350704 Rev
K
4
