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Fig. 3.35: Components of the pneumatic circuit | The air sucked into the compressor stage is compressed to final pressure by the rotors.
1 = Intake filter
The intake filter cleans the air drawn in by the compressor stage.
2 = Suction controller
The suction controller opens (operation mode) or closes (idling mode and stopped) the intake line, depending on the operating status of the compressor.
3 = Compressor stage
The compressor stage compresses the intake air.
4 = Compressed air/oil vessel
Inside the compressed air/oil vessel the compressed air and oil are separated by gravity.
5 = Oil separator
The oil separator removes the residual oil from the compressed air.
6 = Minimum pressure valve MPV
This valve opens only when the system pressure has risen to 3.5 bar, which causes a fast build-up of system pressure and assures lubrication in the start-up and pressure phase of the compressor. When the compressor is switched off the minimum pressure valve prevents compressed air from flowing out of the compressor.
7 = Compressed air aftercooler (air cooled)
The compressed air is cooled in the aftercooler. During this phase, a large proportion of the moisture in the air condenses out.
8 = Stop valve
The screw compressor can be isolated from the system via the stop valve located at the outlet of the compressor. |