How does a control valve operate in a fire sprinkler system?

A control valve in a fire sprinkler system plays a crucial role in regulating the flow of water throughout different sections of the system. This function is vital for ensuring that the system can deliver the appropriate amount of water to specific areas that may require it during a fire event.

When a control valve is open, it allows water to flow freely, enabling the sprinklers in the designated zones to operate effectively. Conversely, when the valve is closed, it restricts or stops the flow of water, which can be necessary for maintenance or to prevent unintended activation of sprinklers in areas that do not need water at the moment.

This regulation helps maintain the balance and efficiency of the fire protection system, ensuring that adequate water pressure and flow are available where they are most needed while minimizing waste in other areas.

Other options relate to different functions that are not directly associated with the fundamental operating role of a control valve in a fire sprinkler system. For instance, sounding alarms, monitoring temperature levels, and providing pressure readings focus on detection, monitoring, and system management rather than the specific regulation of water flow that a control valve is designed for.