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A
1
E
B
D
C
B
F
6
Function • Funcionamiento •Fonctionnement• Função
English
Structure of the membrane dryer
A : Head (inlet / outlet)
B : Housings / Filter housings
C : Filter with support
D : Membrance element with rigid pipe
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E : Nozzle with adapter
F : Float drain FAD055
Function
(1) Humid compressed air enters the
unit through the head (A) and flows
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downwards through the core tube of the
membrane element (D).
(2)It then passes through the filter (C)
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installed at the bottom outlet of the core
tube where all residual aerosols and par-
ticles are removed from the compressed
air. The resulting condensate is drained
off at the base.
In the area of the filter element, the com-
pressed air is directed in the opposite
direction and the humid compressed
air flows through the membranes of the
internal membrane element.
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(3) After the membrane element, a partial
flow of compressed air is continuously
branched off and expanded atmospher-
ically at a nozzle (E).
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As a result, this purge air is much dryer
than the compressed air, as the moisture
is distributed to a much larger volume.
(4) This very dry purge air is conducted
in the membrane element (D) over the
outside of the membranes and distributed
very evenly by the ordered position of the
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membranes.
(5)This means that there are two air
flows through the membrane element,
separated by the membrane wall two
air flows are in opposite direction to each
other and consist of air with a different
water content:
Humid compressed air at the inside and
dry purge air at the outside. Due to the
humidity gradient, water diffuses from the
compressed air to the purge air.
(6) The compressed air exits the DRY-
POINT
dryer in a dry state.
(7) The moist purge air enters the envi-
ronment.
MDp compressed air membrane
®
DRYPOINT
MD premium series
®
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