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Steam Traps - Back Pressure and Capacity

A back pressure in a condensate systems will reduce steam trap capacity

Steam trap capacities are reduced if there is a back pressure in the condensate system. A back pressure can be the result of excessive flash steam generation.

Back pressure and reduction in steam trap capacities:

Reduction in Steam Trap Capacity (%)
Inlet PressureBack Pressure (%)
(psig)(bar)255075
5 0.35 6 20 38
25 1.75 3 12 30
100 6.9 0 6 25
200 13.8 0 5 23

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