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

Prepare for the Maine Gas Exam with our comprehensive quiz. Use flashcards and multiple choice questions, each featuring hints and explanations, to ace your test!

An excess flow valve is a safety device designed to automatically shut off gas flow in the event of a significant leak or rupture in a gas pipeline. Its primary role is to mitigate the risk of gas escaping into the environment, which could potentially lead to hazardous situations such as explosions or fires. When the valve detects an unusual increase in flow that exceeds preset limits, it reacts by closing, effectively stopping the flow of gas to prevent further leakage.

This function is critical for enhancing the safety of gas systems, ensuring that any significant breach in the pipeline does not lead to uncontrolled gas release. By preventing such incidents, excess flow valves play an essential role in protecting both property and lives, complying with safety regulations and standards associated with gas systems.

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