A steam trap is a device used to discharge condensates and non-condensable gases with a negligible consumption or loss of live steam. Moststeam traps are nothing more than automatic valves. They open, close or modulate automatically. … Have the capability of discharging air and other non-condensable gases.

Steam traps are a type of automatic valve that filters out condensate (i.e. condensed steam) and non-condensable gases such as air without letting steam escape. In industry, steam is used regularly for heating or as a driving force for mechanical power.

Steam traps are used anywhere there is a steam-powered system to discharge condensate, that is, the liquid that builds up in the pipelines, along with other non-condensable gases, to relieve the pressure in the lines and regulate the flow ofsteam within in it.