Standard Duty Desiccant Systems3 stage standard duty desiccant system The standard duty desiccant system offers the same benefits as the heavy duty system, but is designed for less frequent use. It is also a 3 stage system engineered to provide high quality air. It removes dirt, water, oil and uncondensed moisture from compressed air lines. Very efficient at protecting expensive and sensitive air tools. Does not require electricity or refrigerants to provide extremely dry