What is the function of a pressure indicator on a steam line?

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Measuring and displaying the pressure in the steam line is essential for monitoring and controlling the system. The pressure indicator provides a real-time reading of line pressure, letting operators and control systems detect overpressure, regulate valve openings, and adjust boiler firing or feedwater as needed. This keeps the steam system safe and efficient. It doesn’t measure temperature, which would be a temperature indicator; it doesn’t show flow rate, which would be a flow meter; and void fraction relates to two-phase mixtures, not the typical purpose of a steam line pressure gauge.