Cylinders
Cylinder Capacity & Pressure
A cylinder's capacity indicates the volume of uncompressed air a cylinder holds when filled to its maximum rated pressure. For example, if you have an 80 cubic foot cylinder, 80 cubic feet of uncompressed air can be compressed into that cylinder. The capacity of most cylinders ranges from 50 cubic feet to 120 cubic feet.
A cylinder's maximum service pressure refers to the maximum pressure a cylinder can be filled to, and this determines the physical size required to contain the rated capacity of air.
The illustration to the left demonstrates the relationship of capacity and pressure. As you can see, increasing capacity without increasing the maximum service pressure results in a larger cylinder, while increasing the maximum service pressure allows a cylinder with a smaller physical size to hold the same amount of air.
A cylinder's maximum service pressure refers to the maximum pressure a cylinder can be filled to, and this determines the physical size required to contain the rated capacity of air.
The illustration to the left demonstrates the relationship of capacity and pressure. As you can see, increasing capacity without increasing the maximum service pressure results in a larger cylinder, while increasing the maximum service pressure allows a cylinder with a smaller physical size to hold the same amount of air.
