The air entering the expander passes through the indicator silica gel in the unit and is dried. As the moisture increases, the silica gel changes colour from blue to pink. The lighter the shade of silica gel, the more moisture it contains. The pink colour indicates that it is time to replace the silica gel.
At the inlet/outlet, the air passes through a trap made of transformer oil, which cleans the incoming air of mechanical impurities. When changing the silica gel, the oil in the odour trap must also be changed.
- Silica gel mass 0.8 kg
- Transparent PMMA flask