What is the purpose of an air purge system in boiler operation?

The purpose of an air purge system in boiler operation is to remove air from the system and prevent cavitation in pumps. When air enters a boiler or any hydronic system, it can create air pockets that interfere with the efficient operation of pumps and other components. Cavitation occurs when vapor bubbles form in a liquid due to a drop in pressure, and if air is present, it can exacerbate this issue. An air purge system effectively eliminates trapped air, ensuring that water or steam can circulate freely without the disruptions that air could cause. This process enhances the overall efficiency and reliability of the boiler system, helping it maintain optimal performance.