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Air Techniques, Inc.
1 Compressor
2
Pressure tank
3
Pressure switch
4 Cooler
5
Membrane dryer
7
Pressure hose
8
Suction filter
9
Pressure gauge
10
Safety valve
11
Vibration damper
12 Capacitor
Figure 1b.
AERO200M Key Components
1.3.3 Function description with drying installation
The product consists of a piston compressor aggregate, a pressure receiver, a control unit with control and safety
elements, a cooler and a membrane dryer.
Atmospheric air will be sucked in by the suction filter Figure 1b. This air will be compressed by the piston in the
cylinder. The inlet and outlet respectively close a flow direction, which leads the compressed air to the cooler (4)
and then the membrane dryer (5).
The hot and humidity saturated compressed air coming from the compressor aggregate flows into the cooler (4).
In the cooler the compressed air will be cooled down to only a few degrees C above the room temperature, hereby
condensing out water. 100 % saturated compressed air and condensate are separated from the cooler and flow
into the drain-valve. The condensate which is in the air will be separated by the sinter filter and accumulated in the
water collecting receiver. The automatic condensate drain valve blows off the water, level-controlled, periodically.
Thereafter the air will be directed to the membrane element. The air flows through the membrane fibres thereby the
water molecules contained in the air diffuse through the membrane wall and accumulate outside of the fibre. The
dried air flows now via the fine filter, the relief valve and the check valve to the receiver (2).
For regeneration a small portion of dried air will be directed via the purge air nozzle to the outside of the membrane
fibre, absorbs the accumulated humidity and will be discharged to the ambient. This
regeneration is made continuously during operation. No standstill periods are necessary. The relief valve which
is built in in the upper part of the membrane makes sure that the membrane dryer reaches its nominal operation
value within the shortest possible time. The moisture indicator which is installed in the upper part of the membrane
is visible through the transparent upper part. In case of a failure of the dryer which causes an insufficient air drying,
there will be a color change from blue into pink.
The compressor aggregate (1) generates compressed air as long as the pressure switch (3) signalizes that the
adjusted shut-off pressure is reached. Now the machine shuts down. The pressure is indicated by the pressure
gauge. (9) The pressure hose will be depressurized by the integrated relief valve.
The tank pressure declines when taking out pressure for a consumer. On reaching the start-up-pressure the
compressor aggregate will be automatically restarted by the pressure switch. A safety valve (10) prevents that the
maximum permitted tank pressure is exceeded.
Introduction and General Advice
