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Compressed-air dryer

Citing concrete producers’ limited options for eliminating moisture from compressed air lines, the manufacturer presents D Series single tower deliquescent dryers as easy to maintain and operating without moving parts or power requirements. Air delivered to plant equipment exhibits a dew point 20°F below that of the air temperature at dryer inlet. As long as the air temperature down stream of the dryers remains above the dew point provided, plant operators will observe no liquid or freeze-ups.

D Series towers most commonly deployed in concrete production are the D8–D16 models, with flow ratings from 50-150 SCFM (at 100 PSIG), with a maximum pressure of 250 PSIG. Deliquescent dryers can be installed virtually anywhere, indoors or outdoors. For portability, they can also be mounted to trucks or trailers. The dryers are especially suited for low pressure air, intermittent flows, and point-of-use applications. — Van Air Systems, Lake City, Pa., 800/840-9906;

Moisture-bearing compressed air enters the vessel at an inlet on the lower left, flowing through a bed of Dry-O-Lit desiccant, which acts like a sponge and absorbs water vapor. As it slowly dissolves, the desiccant forms a liquid that falls to the bottom of the vessel, from which it is easily drained through a valve. Dry compressed air exits at the top right.