What is the ADP&PDP in air dryer?

Answer Posted / vishal fulchand

The A.D.P. is related to temperature, while the P.D.P. is
related to pressure. The relationship is inverse: Lower
temperatures or higher pressures encourage condensation or,
in your case absorption of water by the desiccant material.
Higher temperatures or lower pressures do the opposite,
which is why at high enough temperatures (and sometimes
lower pressures also, as in a partial vacuum) the water is
driven from the desiccant material thereby "re-newing" it
to be used again.

The tendency for water to condense or evaporate is a factor
of its vapor pressure, which is temperature related and the
air pressure.

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