Which component is often part of a CNG system?

Safety valves are an essential component of a CNG system because they play a critical role in ensuring the safe operation of the system under high-pressure conditions. These valves are designed to automatically release pressure if it exceeds a predetermined level, preventing potential hazards such as leaks or explosions. In environments where compressed natural gas is stored and transported, safety valves provide an important safety mechanism to protect both the equipment and the personnel involved.

In comparison with the other options, while air compressors may be used in various systems to compress air, they are not a standard component specific to CNG systems. Electric generators are unrelated to the core functions of the CNG delivery process, and though they may be used in conjunction with other energy applications, they do not serve as a primary component in CNG systems. Fuel cells, while relevant in discussions of alternative fuel technologies, are not part of traditional CNG systems, which focus on the storage and delivery of compressed natural gas itself rather than its conversion into electricity.