Introduction to Steam

  1. Function and Operation of Steam Traps

    1. Operating Characteristics of Steam Traps


Operating characteristics of steam traps can be broadly divided into two types: intermittent operations and continuous operations.



  1. Intermittent operations


    This type of operation allows the flow of incoming condensate to be drained at a rapid rate, and relates to the bucket trap and thermodynamic disc trap. In general, the bucket trap is generally more frequent than the thermodynamic disc trap. In addition, the temperature of the condensate in the bucket trap at time of valve opening is saturated temperature, whereas it is much lower in the case of the thermodynamic disc trap.


    ● Bucket trap




    ● Thermodynamic Disc Trap




    Figure 2.14 Intermittent operations

  2. Continuous operations




This is a type in which incoming condensate is discharged continuously by adjusting the degree of valve opening. Ball float steam traps and thermostatic traps (temperature control steam traps and diaphragm traps) are categorized using this type. The ball float steam trap discharges condensate at almost the same temperature as saturated temperature, and thermostatic traps discharges condensate at a lower temperature than saturated temperature or at a pre-set temperature.




● Ball float steam trap








● Temperature Control steam traps and diaphragm traps






Figure 2.15 Continuous operation characteristics