What is the primary function of a pressure switch in a boiler?

The primary function of a pressure switch in a boiler is to monitor and control steam pressure automatically. Pressure switches are designed to detect the pressure levels within the boiler system and ensure they remain within specified limits. When the pressure reaches a predetermined threshold, the switch activates or deactivates the equipment accordingly, providing a safety mechanism to prevent overpressure situations that could lead to dangerous conditions or equipment failure.

This automatic monitoring is critical for maintaining safe operational parameters and efficient boiler performance. If the pressure exceeds a safe level, the pressure switch can trigger alarms, initiate shutdown procedures, or activate other safety devices to protect the boiler and personnel.

The other options pertain to different functions that a boiler may perform or require, but they are not the primary role of a pressure switch. Regulating water flow, providing emergency shut-off, and measuring water temperature involve separate mechanisms and controls within the boiler system, emphasizing the specialized role of the pressure switch in maintaining pressure integrity.