What is the function of the excess flow valve?

The excess flow valve plays a critical safety role in gas systems by restricting gas flow in the event of a line break or disconnect. Its primary function is to prevent excessive gas from escaping into the environment, which could lead to hazardous situations such as fires or explosions. When there is a significant drop in pressure, indicating a potential leak due to a broken line, the valve automatically closes or limits the flow of gas, thereby providing an essential safeguard for both users and property.

In systems where gas is transported, maintaining safety and preventing leakage is paramount, and the excess flow valve is specifically designed to respond to emergencies by reducing or stopping the flow of gas when necessary. This capability helps protect against the risks associated with uncontrolled gas release, ensuring that the system operates safely and efficiently.