What is the typical operating range of the condensate returns in a vacuum system?

In a vacuum system, the typical operating range for condensate returns is found within the range of 3-8 inHg. This range is critical for maintaining effective operation of the system. It ensures that the vacuum pressure is adequate to facilitate the removal of condensate while preventing the risk of boiler water from being pulled into the condensate return lines.

Operating within this range also promotes efficient heat transfer and minimizes the formation of steam pockets or air leaks that could lead to system inefficiencies. The balance between vacuum and atmospheric pressure is essential for the optimal performance of steam heating systems, and the 3-8 inHg range strikes a necessary equilibrium that supports proper condensate flow and overall system functionality.