What device supplies water to the boiler to maintain water levels?

The device that supplies water to the boiler to maintain water levels is indeed the feedwater pump. This component plays a crucial role in the operation of a boiler system by ensuring a continuous supply of water at the appropriate pressure.

As the boiler generates steam, water is converted into steam and needs to be replaced to maintain the proper water level for safe and efficient operation. The feedwater pump pulls water from a supply source, which may include a condensate return line or another water source, and delivers it to the boiler. This process is essential for preventing low water conditions, which can lead to overheating and potential damage to the boiler.

In contrast to the feedwater pump, a blowdown tank is primarily used to remove sediment and impurities from the boiler water, rather than supplying water. The condensate return line is designed to return unused steam back to the boiler as water but does not actively supply new water itself. The inverted bucket steam trap is utilized to separate condensate from steam and allows air and non-condensable gases to escape, but it is not responsible for maintaining water levels in the boiler.

Thus, the feedwater pump is integral to sustaining the boiler's water level, ensuring operational efficiency and safety.