Which of the following valves can be set to automatically control the flow of inert gas to the deck distribution system?

The gas regulating valve (GRV) is specifically designed to automatically manage the flow of inert gas within the system. Its primary function involves controlling the pressure and ensuring that the gas is delivered at the correct pressure to the deck distribution system. When the inert gas system is under operation, the GRV utilizes feedback from pressure sensors or flow meters to make real-time adjustments, ensuring that the pressure remains within predetermined limits and preventing overpressure conditions.

This automatic flow regulation is critical for maintaining safe operational parameters and enhancing the efficiency of the inert gas system, which is vital for preventing explosions in cargo tanks by displacing flammable vapors with inert gases.

In contrast, while pressure relief valves and control valves have their respective roles in a system, they do not typically function to automatically regulate the flow in response to system demands to the same extent as a gas regulating valve does. A check valve serves to prevent backflow but does not control the flow rate or pressure of inert gas. Thus, the GRV stands out as the appropriate valve for the automatic control of inert gas flow to the deck distribution system.