If you or a family member is on home oxygen therapy, the most common question is — how long will this cylinder last before I need a refill?
The answer depends entirely on the flow rate your doctor has prescribed. Here is a simple breakdown for a full B-Type oxygen cylinder:
At 0.5 LPM (litres per minute): approximately 140–150 hours At 1 LPM: approximately 70–75 hours At 2 LPM: approximately 35 hours At 3 LPM: approximately 23 hours At 4 LPM: approximately 17–18 hours
Most home patients are prescribed 1–2 LPM, which means a full B-Type cylinder typically lasts 3–7 days of continuous use.
The B-Type cylinder stands 3 feet tall, weighs 17 kg, and holds approximately 7.1 cubic metres of oxygen at 150 bar pressure. It is made from seamless cast iron steel and is the most widely used medical oxygen cylinder in India — because of its large capacity and low cost per hour of oxygen therapy.
Tips to make your cylinder last longer:
- Always use the exact flow rate prescribed by your doctor — do not increase it without medical advice.
- Make sure the regulator is fully closed when the patient is not using oxygen.
- Check for leaks at the connection points regularly — a hissing sound or smell of oxygen is a sign of a leak.
- Keep a spare cylinder at home so you are never caught short during off-hours.
When to refill: Do not wait until the cylinder is completely empty. Bring it for refill or call us when the pressure gauge drops below 25–30 bar. At that point, the flow rate may become inconsistent.
For refills and new B-Type cylinders with same-day delivery across North-East Delhi, contact Ankur Oxygen Gas Agency at +91 99685 25841.
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