Hi Flow Stroller Technical Service Manual • PN 14314465 Rev
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Equipment Description
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CAIRE, Inc.’s Hi Flow Stroller is the portable component of the
Liberator/Portable supplementary oxygen system. Enclosed in
a durable simulated leather case, Hi Flow Strollers incoporate a
stainless steel cryogenic container with the valves, plumbing, and
associated hardware required to deliver gaseous oxygen to the pa-
tient at near ambient temperature.
The Hi Flow Stroller is comprised of five major assemblies,
grouped according to function.
1. Cryogenic Container – This assembly is a double walled,
vacuum insulated dewar for storing liquid oxygen at approxi-
mately -180°C (-300° F).
2. Breathing Circuit – This circuit consists of the manifold as-
sembly, fixed orifice rotary flow control valve (FCV) and
vaporizing coil. It withdraws liquid oxygen from the cryo-
genic container, warms it to near ambient temperature, and
regulates the flow of oxygen gas to the patient. Water that
condenses on the cold coils is collected and absorbed by the
condensate pad.
3. Case Assembly – The case houses and protects the cryogenic
container, the breathing circuit, and the liquid level meter.
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.
5. Filling Circuit – This manual covers both the side fill Hi Flow
with the rotary quick disconnect valve and the top fill Hi Flow
with the push quick disconnect valve for filling.
FIGURE 1: Hi Flow Stroller Components
