Thermodynamic Steam Traps

Thermodynamic traps work on the difference in dynamic response to velocity change in flow of compressible and incompressible fluids. As steam enters, static pressure above the disk forces the disk against the valve seat. The static pressure over a large area overcomes the high inlet pressure of the steam. As the steam starts to condense, the pressure against the disk lessens and the trap cycles. This essentially makes a TD trap a "time cycle" device: it will open even if there is only steam present, this can cause premature wear. If non condensable gas is trapped on top of the disc, it can cause the trap to be locked shut.

The operation principle for these traps utilizes the difference in the thermodynamic properties of condensate and steam. Also known as 'Disc Traps' Read more..

Operating Pressure Range: 0.025 - 26 MPaG
Operating Temperature Range: 0 - 550 C