Best practice no 23

Thermodynamic (operated by changes in fluid dynamics). Thermodynamic steam traps rely partly on the formation of flash steam from condensate. This group includes thermodynamic, disc, impulse and labyrinth steam traps. • Dynamic stage . The pressure of the condensate lifts the inner disc of the thermodynamic trap, allowing flow to the radial outlet orifice. The condensate discharge continues until the steam reaches the trap. The steam with a greater specific volume acquires greater speed when passing through the orifice and generates a low-pressure zone under the disc, making it fall on its seat and closes the trap. • Thermal stage . The trap remains closed until the high pressure vapor that has been trapped on the disc is transformed into condensate. Once the steam cools and condenses, it loses pressure and the disc lifts allowing a new discharge cycle.

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