Steam Traps & Condensate Recovery5 / 12
Steam Trap Types & Function
Thermostatic, float, inverted bucket, and bimetallic traps — how each works.
10 min read · Jacob Willis, Net Zero Lead · Last reviewed July 2026
Every point where steam gives up its heat produces condensate, and that condensate must leave immediately, without letting live steam escape with it. The device that performs this discrimination is the steam trap: an automatic valve that opens to water and air but closes to steam. A site may have dozens or hundreds of them, they are the most numerous active component in the system, and choosing the right type for each duty is what determines how well and how long they do it. This lesson covers the three families and the selection logic.
In this lesson
- 01Three ways to tell steam from water
- 02Matching trap to duty
- 03Sources and further reading