How does a pressure gauge function in a boiler system?

In a boiler system, the primary function of a pressure gauge is to display the pressure within the boiler. This is critical for safe operation, as it allows operators to monitor the internal pressure of the steam or water to ensure it remains within safe limits. High pressure can indicate a risk of equipment failure or even catastrophic failure if not managed properly.

The pressure gauge typically uses a mechanical or electronic diaphragm to indicate pressure. The reading is essential for controlling the firing of the boiler and maintaining safe operating conditions. Monitoring this pressure helps operators make informed decisions about adjustments needed in operation and maintenance.

The other choices relate to different elements of boiler operation but do not accurately describe the specific role of a pressure gauge. For example, measuring temperature pertains to temperature gauges, indicating steam production rate relates to flow meters or steam flow measurement devices, and regulating water levels is managed by water level controls or feedwater systems rather than pressure gauges.