Calculator
Oxygen Cylinder Duration Calculator
Estimate oxygen cylinder duration from cylinder factor, pressure, reserve pressure, and flow rate.
Calculator Inputs
Cylinder pressure must be a valid number.
Cylinder pressure must be greater than reserve pressure.
Legend
Oxygen cylinder legend
The cylinder factor converts usable pressure drop into approximate oxygen volume. Reserve pressure is subtracted because a hospital should not plan to empty a cylinder completely.
Input meaning
- Cylinder factor: select the option that matches the source document, device label, certificate, or installed system.
- Cylinder pressure: enter the measured, quoted, or hospital-approved value in psi.
- Reserve pressure: enter the measured, quoted, or hospital-approved value in psi.
- Flow rate: enter the measured, quoted, or hospital-approved value in L/min.
Result interpretation
- Usable oxygen is the estimated volume available above the reserve pressure.
- Estimated duration is a planning estimate; actual duration changes with leaks, regulator behavior, and changes in prescribed flow.
Assumptions
- Use local cylinder factors and policies.
- Do not use estimates as the only basis for emergency oxygen planning.
Biomedical use
- Useful for cylinder changeover planning, patient transfer checks, emergency trolley review, and oxygen manifold contingency planning.
How to identify the required values
Use these examples and common working ranges to choose values from gauges, labels, manuals, datasheets, RFQs, service reports, CMMS records, or hospital planning assumptions.
| Field | Example value | Common range | Tip |
|---|---|---|---|
| Cylinder factor | E cylinder often uses about 0.28 L/psi. | Use the cylinder or generator factor that matches the actual standard in use. | Use the cylinder or generator factor that matches the actual standard in your hospital. |
| Cylinder pressure | A full oxygen cylinder gauge may show around 2,000 psi in some systems. | Portable oxygen cylinders are often checked around 500-2,000 psi; use your local full-cylinder pressure. | Read the gauge before starting the transfer or treatment. |
| Reserve pressure | Common planning reserve: 200 psi. | Common oxygen cylinder planning reserve is 150-300 psi. | Use the hospital transfer or emergency reserve policy. |
| Flow rate | Nasal cannula 2 L/min; simple mask often 5-10 L/min. | 0.01-200 L/min | Use the actual set flow or expected average flow for the clinical scenario. |
Common ranges are starting points for hospital planning. For final procurement, acceptance testing, electrical design, medical gas design, radiation shielding, dialysis water systems, or clinical use, replace the example values with site-specific data and vendor-confirmed figures.
Input Checklist
Confirm these values before relying on the output for procurement, PM, or service planning.
- Cylinder size/factor
- Cylinder pressure
- Reserve pressure
- Oxygen flow
Safety And Engineering Notes
Use calculator outputs as planning estimates and verify critical systems with calibrated measurement or qualified engineering review.
- Use local cylinder factors and policies.
- Do not use estimates as the only basis for emergency oxygen planning.
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