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Fig. 9.2: Compressed air receiver, standing | Compression causes the moisture in the air to form droplets of water (condensate). This water is usually drawn into the compressed air receiver with the volume flow. This is where compressed air is stored. Heat is given off to the cooler surrounding by the large surface of the receiver and the compressed air cools down. This causes a large part of the condensate to precipitate on the walls of the receiver. The condensate collects on the floor of the receiver and is removed by a suitable condensate collector.
Compressed air receivers that are only emptied at irregular intervals can be corroded by the condensate. One protection against corrosion is to galvanise the receiver in a dip-tank. It is not absolutely essential to galvanise the receiver if the condensate is drained regularly. Galvanising is also a useful option if the condensate contains a high concentration of aggressive components. |