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    Steam Trap Types

    There are two basic designs for the thermostatic steam trap, a bimetallic and a balanced pressure design. Both designs use the difference in temperature between live steam and condensate or air to control the release of condensate and air from the steam line.

    Thermostatic or Bimetallic

    In a thermostatic bimetallic trap it is common that an oil filled element expands when heated to close a valve against a seat. It may be possible to adjust the discharge temperature of the trap – often between 60oC and 100oC.
    This makes the thermostatic trap suited to get rid of large quantities of air and cold condensate at the start-up condition. On the other hand the thermostatic trap will have problems to adapt to the variations common in modulating heat exchangers.

    Float Steam Traps

    In the float steam trap a valve is connected to a float in such a way that a valve opens when the float rises.
    The float steam trap adapts very well to varying conditions as is the best choice for modulating heat exchangers, but the float steam trap is relatively expensive and not very robust against water hammers.

    Inverted Bucket Steam Trap

    In an inverted bucket steam trap a leverage system multiplies the force provided by the bucket to open a valve against the pressure. The bucket is open at the bottom and robust against water hammers.

    Thermodynamic Disc Steam Traps

    The thermodynamic trap is an robust steam trap with simple operation. The trap operates by means of the dynamic effect of flash steam as it passes through the trap.

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