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Oxygen Cylinder Duration - TAV® Mode
The following tables provide approximate duration times for B (M-6) and E (M-24) oxygen tanks.
Please note that these gures are only meant to serve as a guide.
Note: Actual tank durations will depend on your actual breathing rate, the initial fullness of the
tank, and other factors.
Please note that TAV® ow setting 4 does not support a breath rate higher than 25 bpm and TAV®
ow setting 5 does not support a breath rate higher than 20 bpm.
Table 1: Cylinder Size B (M-6) 150 liters when full
Breaths per Minute
12 14 16 18 20 21 22 23 24 25 30
Flow Setting Tank duration in hours
1 4.2 3.6 3.1 2.8 2.5 2.4 2.3 2.2 2.1 2.0 1.7
2 2.1 1.8 1.6 1.4 1.3 1.2 1.1 1.1 1.0 1.0 0.8
3 1.4 1.2 1.0 0.9 0.8 0.8 0.8 0.7 0.7 0.7 0.6
4 1.0 0.9 0.8 0.7 0.6 0.6 0.6 0.5 0.5 0.5 NA
5 0.8 0.7 0.6 0.6 0.5 NA NA NA NA NA NA
Table 2: Cylinder Size E (M-24) 616 liters when full
Breaths per Minute
12 14 16 18 20 21 22 23 24 25 30
Flow Setting Tank duration in hours
1 17.1 14.7 12.8 11.4 10.3 9.8 9.3 8.9 8.6 8.2 6.8
2 8.6 7.3 6.4 5.7 5.1 4.9 4.7 4.5 4.3 0.4 3.4
3 5.7 4.9 4.3 3.8 3.4 3.3 3.1 3.0 2.9 2.7 2.3
4 4.3 3.7 3.2 2.9 2.6 2.4 2.3 2.2 2.1 2.1 NA
5 3.4 2.9 2.6 2.3 2.1 NA NA NA NA NA NA
Example 1: M6 tank, breaths/minute = 16, ow setting = 3
• Using table 1, nd the breath rate of 16 at the top of the table
• Move down from 16 until you reach the row for ow setting = 3
• The approximate tank duration for this example = 1.0 hours
Example 2:E tank, breaths/minute = 18, ow setting = 2
• Using table 2, nd the breath rate of 18 at the top of the table
• Move down from 18 until you reach the row for ow setting = 2
• The approximate tank duration for this example = 5.7 hours
• The approximate tank duration for this example = 6.3 hour
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