Scuba Cylinder
Definition
A scuba cylinder is a high-pressure tank that stores the compressed breathing gas used during a dive.
More on Scuba Cylinder
Scuba cylinders are usually made of aluminum or steel and come in various sizes and pressure ratings. Common sizes include 80 cubic feet for aluminum tanks and 100 cubic feet for steel. Each cylinder must be hydrostatically tested periodically and visually inspected annually. Tanks have markings indicating their volume, service pressure, and hydro test date. The type of valve (DIN or yoke) also affects compatibility with regulators. Divers should know how to read their cylinder’s markings, track their air consumption, and inspect tanks for corrosion or damage.
Frequently Asked Questions
The 80-cubic-foot aluminum tank is the most widely used recreational scuba cylinder in North America.
Visual inspections are done annually. Hydrostatic testing is required every five years in most regions.
DIN valves screw into the regulator, offering better sealing at high pressures. Yoke valves clamp over the tank post and are more common in recreational diving.
Yes, but it must be empty with the valve removed. Check airline and TSA regulations before traveling.
Store upright in a cool, dry place with a small amount of pressure (~200 psi) to prevent moisture entry.