What does a steam trap with a 15-degree drop across it indicate?

A steam trap with a 15-degree drop across it indicates steam blow through, which signifies that the steam trap is failing to contain and properly separate the condensate and non-condensable gases from the steam line. In an efficient steam system, steam should not be escaping through the trap; rather, the trap should allow only condensate to pass while retaining steam. The presence of a significant temperature drop (such as 15 degrees) suggests that steam is passing through the trap instead of being condensed and returned to the boiler system.

In this scenario, if the trap were functioning correctly, you'd expect minimal temperature changes, indicating that the steam is being used for its intended purpose. A noticeable drop like this typically denotes an issue where steam is escaping, leading to inefficiencies in the system, possible loss of pressure, and excess consumption of energy. This scenario emphasizes the importance of maintaining the integrity and proper functioning of steam traps in order to ensure that the steam system operates effectively and efficiently.