What does an excess flow control system do?

An excess flow control system is designed to enhance safety within a gas piping system by automatically shutting off the flow of gas when it detects a rupture or a significant flow change indicative of a leak. This mechanism is crucial in maintaining safety, as it prevents the possible hazards that can arise from uncontrolled gas release, which could lead to explosions or asphyxiation in the case of non-flammable medical gases. The system acts as a safety feature to ensure that the gas supply can quickly be contained in emergency situations, thus safeguarding both the facility and its occupants.

The other options do not accurately reflect the primary function of an excess flow control system. Increasing gas flow, regulating pressure, or monitoring temperature does not address the critical safety aspect that excess flow control systems provide.