The activated carbon absorbs troublesome organic impurities from the glycol to reduce foam formation. The activated carbon filter should be installed downstream the glycol filter to prevent collection of debris in the activated carbon filter. This can be well treating chemicals, compressor oils or BTEX components. Fouling of the active carbon is based on absorption so the only way to detect the carbon is no longer active is to check that the glycol is still clear.
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Activated Carbon Filter
