# How long does an Oxygen cylinder last?

Want to watch this video? Sign up for the course
or enter your email below to watch one free video.

## Unlock This Video Now for FREE

This video is normally available to paying customers.

You may unlock this video for FREE. Enter your email address for instant access AND to receive ongoing updates and special discounts related to this topic.

**Calculating Oxygen Cylinder Duration**

**Planning Oxygen Usage**

*Determining How Long Your Oxygen Cylinder Will Last*

**Using the Cylinder Duration Formula**

*Estimating Oxygen Supply Time*

**Step 1: Cylinder Pressure**- Locate the cylinder pressure (psi).
- Subtract a residual pressure of 200 psi to account for errors.
**Step 2: Cylinder Constant**- Refer to the cylinder constant values:
**"D" cylinder:**Constant = 0.16**"E" size:**Constant = 0.28**"M" size:**Constant = 1.56**"G" size:**Constant = 2.41**"H" and "K" size:**Constant = 3.14- Choose the constant based on your cylinder size.
**Step 3: Flow Rate**- Determine the flow rate in litres per minute.
- Typically, regulators provide a maximum of 15 litres per minute.
- Specialist applications may have higher flow rates (e.g., scuba diving, 25 litres per minute).
- Adjust the flow rate as needed (e.g., 6 litres per minute for a nasal cannula).
**Step 4: Calculate Duration**- Use the formula: (Tank pressure - Residual pressure) x Cylinder constant / Flow rate
- Calculate the time in minutes that the cylinder will last.

**Example Calculation**

*Estimating Duration for a "D" Cylinder at 15 Litres Per Minute*

**Step 1:**(2000 psi - 200 psi) = 1800 psi**Step 2:**Cylinder Constant for "D" size = 0.16**Step 3:**Flow rate = 15 litres per minute**Step 4:**(1800 psi x 0.16) / 15 litres per minute = 19.2 minutes**Estimated Duration:**Approximately 19 minutes (rounded down)

Use this formula to calculate the duration of your oxygen cylinder based on your specific parameters.

## Recommended Products For You

PRO Dental Kit No Bag
£99.95 + VAT

Public Access Bleed Control Kit Pro - Large
£80.00 + VAT

HeartSine 350P Internal Package - Special Offer
£875.00 + VAT

BSi First Aid Kit Medium
£20.09 + VAT

HeartSine samaritan PAD 350P - Special Offer -
£745.00 + VAT

PRO Dental Kit with bag
£345.00 + VAT

Dental Medical Resus Pack
£242.00 + VAT