SCBA Air Duration
Theoretical air-cylinder duration from cylinder volume, pressure, and consumption rate. Apply safety factor.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Cylinder water-volume | L | |
| Service pressure | bar | |
| Respiratory minute volume | L/min |
Source: SOLAS II-2 Reg 10 / FSS Ch.3; EN 137 - Respiratory protective devices
In short
Theoretical air-cylinder duration from cylinder volume, pressure, and consumption rate.