Stephan Alia - Compressed Air Supply

®
3 Components and functions
© F. Stephan GmbH SA-112-0106V1.0-WEM-GB 31
3.3.2 Compressed air supply
The compressed air (AIR) is conveyed to the double flowmeter through
the gas input fitting,
Pressure is constantly checked at the compressed air input. The
corresponding pressure switch is queried by the Power Distribution Unit
PDU.
The downstream pressure reducer reduces the pressure to approx. 300
mbar. The non-return valve closes the gas input while the compressor is
running.
A T-piece connects the output of the pressure reducer and the compressor
with the double flowmeter.
If no external compressed air supply is available (input pressure <1 bar),
the compressor is automatically switched on.
The PDU board controls the compressor switching on and off.
Fig. 24: Compressor
1 compressor
The compressor is a maintenance-free magnetic piston pump.
The compressor runs on mains voltage.
The operating voltage for the compressor is generated by the inverter.
This guarantees operation even without the mains power supply.
Compressor
1