Installation and operating manual
EN
12
DRYPOINT
®
M eco control
2.4.1. Basic operating principle
1
2
4
3
6
7
9
8
11
10
12
5
Humid compressed air (2) enters the unit through the
housing head (1) and flows downwards through the rigid pipe
of the membrane element (5) into the housing (4). It then
passes through the nanofilter (6) installed at the condensate
drain of the core tube where all residual aerosols and
particles are removed from the compressed air. Separated
condensate flows out of the base and is routed through the
float drain (7).
The flow direction is reversed in the nanofilter element area
and the humid compressed air flows through the membranes
of the internal membrane element.
Some of the compressed air flow (9) is diverted downstream
of the membrane element and passed by the sensor
continuously in the purge air control.
The sensor measuring results are evaluated in the purge
air control and the purge air feed to the membrane dryer is
opened as required. As a result, the purge air decreases to
atmospheric pressure and is considerably dryer as the damp
contained in the compressed air is distributed to a multiple of
the original volume.
The very dry purge air (10) is fed via the purge air duct in
the head and the purge air nozzle (3) on the external side of
the diaphragm (11) and evenly distributed by the arranged
position of the diaphragms. This means that two air flows
move through the membrane element (5) in an opposite
direction with differential damp content:
Damp compressed air on the inside and dry purge air on the
outside.
Due to the damp difference, water diffuses from the
compressed air into the purge air. The damp purge air (12) is
then released to the ambient air. The compressed air (8) exits
as dry from the membrane dryer.
