Companion 1000/T Operation; Filling - CAIRE COMPANION 1000 Technical Manual

2.3

COMPANION 1000/T OPERATION

2.3.1
2-6 Theory of Operation
00
(690)
75
(5 8)
50
(345)
25
( 73)
0
-300
(- 84)
Figure 2-9: Liquid Oxygen Saturation Curve
Maintaining liquid oxygen saturation at approximately 22 psig (152 kPa) is important.
The liquid oxygen transferred into the Companion 1000/T Portable must be saturated
at 22 psig (152 kPa) to ensure proper oxygen flow to the patient. Also, as liquid oxygen
is withdrawn from the Portable, pressure drops slightly, allowing a small amount of
saturated liquid oxygen in the container to readily vaporize and replenish the lost
pressure.
The following information provides a brief description of the Companion 1000/T
Portable system operation.

Filling

The Companion 1000/T is filled from a Companion Stationary reservoir. The
Companion T moisture cup must be removed from the unit before filling. To begin the
fill sequence (Figure 2-10), first engage the female fill connector located at the bottom of
the Portable with the Stationary male fill connector. Opening the Portable vent valve
permits gas within the container to escape to the atmosphere, creating a pressure drop
necessary for the liquid oxygen to flow from the Stationary into the Portable. At first,
the liquid oxygen leaving the Stationary vaporizes into gas and is vented to atmosphere.
This "flash off" is due to the relatively warm temperature of the Portable container and
to the supersaturated condition created by the pressure drop during filling. Within a
short time, the vaporization process cools the inner container to a temperature that
enables liquid oxygen to be retained in the container.
Companion 1000/T Liquid Oxygen System Technical Manual
-290 -280 -270
(- 79) (- 73) (- 68)
ATURATION TEMPERATURE — °F (°C)
-260 -250
(- 62) (- 57)
B-701964-00 Rev. C