The oxygen cylinder is now close at hand. According to the patient's needs, our knowledgeable crew is available 24 hours a day, both inside and outside of Dhaka, to provide oxygen cylinders. In accordance with the doctor's instructions, our staff will transport the oxygen cylinder to your home along with an oxygen flowmeter, nasal cannula, and oxygen cylinder trolley. Additionally, we are by your side for oxygen cylinder refills. Above all, we want to gain your trust by offering high-quality products.
Breathing oxygen is delivered from the storage tank to users by use of the following methods: oxygen mask, nasal cannula, full-face diving mask, diving helmet, demand valve, oxygen rebreather, built-in breathing system (BIBS), oxygen tent, and hyperbaric oxygen chamber.
Contrary to popular belief, scuba divers very rarely carry oxygen tanks. The vast majority of divers breathe air or nitrox stored in a diving cylinder. A small minority breathes trimix, helix, or other exotic gases. Some of these may carry pure oxygen for accelerated decompression or as a component of a rebreather. Some shallow divers, particularly naval divers, use oxygen rebreathers or have done so historically.
Oxygen is rarely held at pressures higher than 200 bars (3,000 psi), due to the risks of fire triggered by high temperatures caused by adiabatic heating when the gas changes pressure when moving from one vessel to another. The pressure in medical liquid oxygen gas tanks is typically 350 psi (24 bars). 
All equipment that comes into contact with high pressure oxygen must be "oxygen clean" and "oxygen compatible" in order to reduce the risk of fire.  "Oxygen clean" means the removal of any substance that could act as a source of ignition. "Oxygen compatible" means that internal components must not burn readily or degrade easily in a high-pressure oxygen environment.
In some countries, there are legal and insurance requirements and restrictions on the use, storage, and transport of pure oxygen. Oxygen tanks are normally stored in well-ventilated locations, far from potential sources of fire and concentrations of people.