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Companion Portable Technical Service Manual • PN 20562220 Rev B
16
Companion P
or
tables
Saturation Principles
VII
If the saturation pressure of the liquid in the portable unit is greater than 1.93 bar (28 psi) the following symptoms may occur:
• Increased product loss and evaporation rate
• Decreased durations
• High flow rates
• Venting from relief valves
• Relief valves frozen open
If the saturation pressure of the liquid in the portable unit is lower than 1.2 bar (18 psi) the following symptoms may occur:
• Decreased evaporation rates
• Low flow rates
• No oxygen flow
• Portable will not fill
High saturation pressure in portables can be prevented by always ensuring that the reservoir being used to fill the portable is filled
according to its respective service manual. The saturation pressure of a portable unit is equal to the saturation pressure of the LOX
inside of the reservoir used to fill the portable.