What activates a certain function in the mercury system besides the mercury switches?

In the context of a mercury system, control valves play a critical role in managing the flow and movement of liquids or gases within the system. They are designed to open and close, regulating the passage of fluid based on specific parameters such as pressure, temperature, or flow rate. The activation of these control valves can occur in response to various stimuli, such as readings from pressure gauges or temperature monitors, but they are fundamentally integral to the operation of the system.

When control valves are engaged, they can influence other system functions by varying the conditions within the system, facilitating or hindering the movement of mercury as needed. This interaction is essential for the optimal performance of the system, ensuring that the mercury responds appropriately to the demands placed upon it.

While pressure gauges, flow meters, and temperature monitors provide valuable data that can inform system operations, the control valves directly interface with the flow of the medium and thus can be considered the primary active component that affects how functions are executed based on those readings. This direct influence underscores the importance of control valves in the functioning of the mercury system.