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Back Pressure and Steam Trap Capacity

Back pressure in a condensate systems will reduce the steam trap capacity

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The steam trap capacity are reduced if there is a back pressure in the condensate system. A back pressure is often a result of excessive flash steam generation.

The reduction in steam trap capacity is indicated in the table below.

Reduction in Steam Trap Capacity (%)
Inlet Pressure % Back Pressure
25 50 75
(psig) (bar)
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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