How can steam flow into radiators in a one-pipe gravity return steam heating system be controlled?

In a one-pipe gravity return steam heating system, controlling the flow of steam into radiators is effectively achieved by installing an air vent with different venting capacities. The air vent plays a crucial role in allowing air to escape from the radiator as steam enters. When the vent operates properly, it ensures that steam can fill the radiator efficiently, promoting effective heat transfer. The capacity of the air vent affects how quickly air can be expelled; thus, using vents with varying capacities can optimize steam flow and improve heating performance throughout the system.

Pressure settings, steam trap types, and manual valves do play roles in the overall efficiency and functionality of a steam heating system, but they do not specifically target the control of steam flow directly into the radiators in the same way that an air vent does. Adjusting pressure settings might affect the system's operation but won't specifically regulate steam into individual radiators. Changing the type of steam trap influences condensate removal but doesn't efficiently manage steam input. Using a manual valve could control steam flow but lacks the automatic responsiveness that air vents provide in managing air and steam exchange.