How Long Does an Oxygen Cylinder Last? Refill Timing, Cost and Safety

Quick answer: to refill a medical oxygen cylinder in Dhaka, check how much oxygen is left on the regulator gauge, note your cylinder size, and contact a medical oxygen supplier before it runs out. Peace Oxygen refills medical oxygen cylinders at our shop in Notun Bazar, Dhaka. The refill price depends on the cylinder size, so call or WhatsApp 01719-677350 with your size, or see oxygen cylinder refill in Dhaka.

This guide explains how long an oxygen cylinder lasts, when to refill it, what affects the refill cost, how to check a cylinder is safe to refill, and what to do in an oxygen emergency. It is general information; always use oxygen at the flow rate your doctor prescribes.

How long does an oxygen cylinder last?

The time depends on how much oxygen the cylinder holds and the flow rate on the regulator. A simple way to estimate it:

Hours of use = litres of oxygen in the cylinder ÷ flow rate (litres per minute) ÷ 60

For example (illustration only; real capacity depends on cylinder size and fill pressure), a cylinder holding 1,500 litres of oxygen used at 2 litres per minute lasts about 12.5 hours (1,500 ÷ 2 ÷ 60). The same cylinder at 5 litres per minute lasts only about 5 hours. A half-full gauge means roughly half that time is left. Ask your supplier how many litres of oxygen your cylinder holds when full.

When should you refill?

• Check the pressure gauge on the regulator every day the cylinder is in use.
• Arrange a refill when about a quarter of the pressure is left, not when the needle reaches empty.
• For patients who need oxygen around the clock, keep a second full cylinder as a backup so there is no gap during a refill.
• If oxygen is needed for many hours every day for months, ask your doctor whether an oxygen concentrator would be more practical than repeated refills.

What affects the oxygen cylinder refill price?

• Cylinder size: larger cylinders hold more oxygen and cost more to fill.
• Oxygen grade: patients need medical-grade oxygen. Industrial oxygen is not meant for breathing and should never be used for a patient.
• Cylinder condition: a cylinder with a damaged valve or an expired test date may need servicing before it can be filled.
• Where you refill: Peace Oxygen refills cylinders at its Notun Bazar shop in Dhaka. There is no Peace Oxygen refill service outside Dhaka.

Refill prices change with supply, so confirm the price for your cylinder size before you go. You can compare with buying in our oxygen cylinder price guide.

How to check your cylinder before a refill

• Look for dents, deep rust, cracks or a bent valve. Do not refill a damaged cylinder.
• Check the test date stamped on the cylinder. Cylinders must be pressure-tested at regular intervals, and an out-of-date cylinder should be tested before refilling.
• Keep the valve and regulator free of oil and grease, which can catch fire in contact with pressurised oxygen.
• If the regulator leaks, hisses or shows a wrong reading, replace or repair it: see our medical oxygen regulator and oxygen regulator repair in Dhaka.

Refill, rent or buy?

• Refill if you already own a cylinder in good condition.
• Rent if you need oxygen for a few days or weeks, for example after a hospital stay: see oxygen cylinder rent in Dhaka.
• Buy if you need oxygen regularly and want your own cylinder: see oxygen cylinder prices.

Safe use and transport after refilling

• Keep the cylinder upright and secured so it cannot fall, at home and in a vehicle.
• Store it in a cool, ventilated place away from cooking stoves, heaters and direct sun.
• No smoking, open flames or candles near oxygen.
• Close the cylinder valve when it is not in use.

Read the full oxygen cylinder and concentrator safety guidelines or the Bangla guide to অক্সিজেন সিলিন্ডার ব্যবহারের নিয়ম.

In an oxygen emergency

If a patient has severe breathlessness, blue lips, confusion or a pulse oximeter reading that stays low, go to the nearest hospital or call the national emergency number 999. Do not wait for a refill. Check readings with a pulse oximeter and only change the oxygen flow rate on a doctor’s advice.

Frequently asked questions