When is pegging steam placed on a DA heater?

Pegging steam is typically placed on a direct contact deaerator (DA) heater when it is necessary to maintain a specific temperature or pressure within the system. This often occurs during startup or when the system is not operating at full capacity, helping to prevent vacuum conditions and ensure effective removal of dissolved gases. The use of pegging steam also aids in maintaining the proper functioning of the DA heater by keeping the water at the desired temperature, enhancing overall efficiency.