What is the purpose of an excess flow valve in a compressed gas container?

The purpose of an excess flow valve in a compressed gas container is to shut off the flow of gas if the predetermined flow is exceeded. This is a critical safety feature designed to prevent potentially hazardous situations, such as leaks or excessive discharge of the gas, which can occur due to a ruptured hose or a failure in the system. By automatically closing off the gas supply, the excess flow valve helps to minimize the risk of explosions, asphyxiation, or other dangerous outcomes that could arise from uncontrolled gas release.

This mechanism ensures that the gas system remains within safe operating limits, thereby protecting both equipment and personnel from potential harm. The design and function of excess flow valves are essential considerations in environments where medical gases are used, providing a layer of security in maintaining safe delivery and usage.