What is the primary function of an excess flow valve?

The primary function of an excess flow valve is to shut off gas flow when predetermined limits are exceeded. This important safety mechanism is designed to prevent excessive gas flow that may result from a sudden change in pressure or a breach in the system, such as a pipe rupture. By closing off the flow in such scenarios, the valve helps protect the integrity of the system, prevents gas leaks, and enhances overall safety.

In settings where medical gases are involved, such as in hospitals or clinics, ensuring that gas flow is controlled and that systems are protected against excessive pressure is vital for the safety of patients and staff, as well as for compliance with regulations. Therefore, this safety feature is a critical component of the piping system for non-flammable medical gases.