If a radiator's balancing valve is completely shut off, will there be water in the radiator?

When a radiator's balancing valve is completely shut off, the flow of water into the radiator is effectively stopped. As a result, there can be no water circulating within the radiator itself. Balancing valves are typically used to regulate the flow of water within a heating system to ensure that all radiators receive the appropriate amount of heated water for efficient heating. When the valve is closed, it prevents any water from entering the radiator, and thus, the radiator will remain empty of water. This principle is crucial for understanding how hydronic heating systems operate, as each component must be properly balanced for optimal performance.