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Function • Funcionamiento • Functionnement • Funcionamento
A
1
E
B
D
6
6
C
english
Membrane dryer layout
A : Head (inlet/outlet)
B : Housing
C : Floor with blanking plug
D : Membrane element with core tube
E : Nozzle with adapter
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Function
(1) Moist compressed air enters through
the head (A) and flows downwards
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through the core tube of the membrane
element (D).
In the bottom area, the direction of flow
is reversed and the moist compressed air
then flows through the membranes of the
inner membrane element (D).
(2) At the end of the membrane element
a partial flow of compressed air is con-
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tinuously diverted and atmospherically
expanded through a nozzle (E).
Due to the expansion, the diverted air –
referred to as purge air – becomes much
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drier because the moisture contained in
the compressed air is now distributed
over a much greater volume.
(3) This extremely dry purge air is chan-
nelled through the membrane element
(D) along the outside of the membranes.
Due to the ordered structure of the
membranes, the purge air is very evenly
distributed.
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(4) Consequently, two flows of air with dif-
ferent humidity levels move in a counter-
current direction through the membrane
element, separated only by the mem-
brane wall: inside the moist compressed
air, outside the dry purge air.
As a result of the humidity difference,
moisture diffuses from the compressed
air into the purge air.
(5) Dry compressed air flows out of the
DRYPOINT M membrane dryer.
(6) Moist purge air is discharged into the
environment.
DRYPOINT DM 40-61 C, 40-75 C, 40-90 C
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