The obligation of a steam trap is to hamper to reduce the heat transfer coefficient by mixing the condensate to steam on steam using equipment or main and/or branch steam pipelines by discharging the condensate from the steam pipe line while trapping the steam.
Steam use its potential heat during the applications and by the radiation heat loses on pipelines, steam turns to condensate. In case this condensate not discharged from the pipeline, it causes cavitation and water hammer besides reducing the quality of the steam. An ideal steam trap should have the ability of air venting together with discharging the condensate.
In principle steam traps have to do the followings: