What is the purpose of reverse flow indicators in protection devices?

The purpose of reverse flow indicators in protection devices is to indicate gas flow direction. Understanding gas flow direction is critical for ensuring safety and efficiency in gas systems. Reverse flow indicators help operators identify when gas is flowing in the wrong direction, which could signal potential hazards or operational issues, such as backflow or cross-contamination in systems where multiple lines are interconnected. By providing a clear visual indication of the flow direction, these indicators enable prompt corrective actions to be taken, thereby maintaining the integrity and safety of the entire system.

In contrast, while gas pressure measurement, emergency shutoff control, and gas temperature regulation are all important aspects of managing gas systems, they are not the primary function of reverse flow indicators.