3.1.3 Functional principle
Intake
The compressor unit draws the medium to be compressed or the air via the intake
filter. This contains a replaceable filter insert for removing the solid particles from
the drawn-in medium.
Compression
Compression takes place in the compressor block. The integrated compressor
blocks operate on the displacement principle and are multi-stage piston compres-
sors. Every compressor stage consists of a piston, cylinder and valve head. The in-
take and pressure valves, which are mounted in the valve heads, control the gas
change of the individual compressor stages.
Safety
The individual compressor stages are secured against over-pressure by safety
valves.
Cooling
Spiral heat exchangers cool the medium that is heated up during compression. The
integrated fan wheel provides the necessary cooling air flow. The fan wheel also
serves as the flywheel for driving the compressor.
Filtration
The condensate incorporated in the compressed medium, consisting of water and
oil, is separated from the medium and collected after each compressor stage by
special separators (separator after the first stage is optional).
A cartridge filter continues cleaning of the compressed gas mixture. Depending on
the filter cartridge being used, moisture, oil, residual particles and/or CO are fil-
tered out.
The pressure maintaining valve ensures that adequate pressure builds up in the fil-
ters, even at the start of the filling process, and thus that constant, optimum filter-
ing is carried out.
Condensate drain
Manual condensate drain cocks serve the necessary draining of the separator dur-
ing operation.
On units having an automatic condensate drain (option), electro-pneumatic drain
valves drain the separators at regular intervals. The condensate from the separa-
tors is then directed to a collection vessel.
Distribution
Filling fittings are used to distribute the compressed gas mixture. The consumers
are connected to the compressor unit using special valves with pressure gauges
and filling couplings. The pressure gauges indicate the filling pressure.
With the changeover device (option) you can fill 200 bar cylinders or 300 bar cylin-
ders from a 300 bar compressor unit.
Drive
The compressor is driven by V-belts by the motor. The motor is mounted on a
moveable plate.
3 | Product description OPERATING MANUAL
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A_002_en
28.08.2019
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