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Desiccant Molecular SieveMolecular sieve desiccant is an alkali alumino-silicate. It is a sodium form of Type A crystal structure. Its effective pore opening is 4 angstroms. A common 4A molecular sieve application is dehydrating compressed air. In a desiccant air dryer molecular sieve is regenerated by heating and purging. Regeneration temperatures must be 400° to 600° F, but are not to exceed 1000° F. The degree of regeneration depends on the temperature reached in purge. Molecular sieve is often used as a polishing layer in air dryers to reach dewpoints of -120° F. More Desiccant Molecular Sieve Info |