Which type of boiler component typically deals with thermal expansion?

The component that typically deals with thermal expansion in a boiler system is the expansion tank. An expansion tank is designed to accommodate the expansion of water as it heats up within a closed heating system. When water is heated, it expands, and without a means to manage this increase in volume, pressure could build up and potentially cause damage to the boiler or the piping system.

The expansion tank provides a space for this expanding water to go, maintaining the pressure within safe limits and ensuring that the system operates efficiently. It absorbs the excess volume that results from thermal expansion, which is essential for preventing pressure fluctuations that could lead to operational issues or even system failure.

In contrast, other components like the blow-off valve are used for removing sediment or excess water from the boiler, the feedwater regulator manages the flow of water into the boiler to maintain proper levels, and the pressure gauge simply measures the pressure within the system without playing a role in managing expansion.