N2 Cryogenic plant deriming, dew point

[Gulmi]

thread774-115300

Hi, if dew point after deriming is -41C, how adversely it can impact to operation?
can we start up the unit not reaching required -60C dew point after deriming?

 

[IRstuff]

Well, if it doesn't adversely affect operation, then why do the deriming in the first place? So, why do you do the deriming? The dew point tells you that you still have moisture in the system, as well as other contaminants that came with the moisture.

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[georgeverghese]

Have you checked your dewpoint meter against a calibration gas? - maybe it is time to change the sensor ?