Orifice-Type Steam Trap:

DOE facilities might use continuous-flow steam traps of the orifice type in a few constant service steam systems, ventilation preheaters, oil-heating steam systems, and other systems or services in that condensate forms at a fairly constant rate. The Orifice-type steam traps are not appropriate for services in that the condensate stabilization is not continuous.

While there are various differences of the orifice-type steam trap then each has one thing in general; it contains no moving parts. A single or more restricted passageways or orifices permit condensate to trickle by, but do not permit steam to flow by. A few orifice-type steam traps have baffles further to orifices.