FS-Curtis DL Series

This collection combines DL series desiccant dryer equipment with the desiccant media and consumables that support it, including activated alumina in multiple grades and package sizes. It covers both the dryers and what they consume in service.

Activated alumina is a desiccant media that adsorbs water vapor from compressed air. It is the consumable at the heart of a desiccant dryer — the dryer's mechanical parts last for years, but the media has a finite service life and must be replaced.

Service life depends on operating conditions, inlet air quality, and how well the upstream coalescing filter is maintained. Oil contamination shortens it dramatically. Rather than replacing on a fixed calendar, watch outlet dew point — a sustained rise is the practical indicator that media is spent.

Media grade and volume are specific to the dryer model and tower size. Ordering the wrong grade or an insufficient quantity means the dryer will not reach its rated dew point. Confirm the media specification for your particular dryer before ordering.

Almost always oil carryover from the compressor. Desiccant media adsorbs oil as readily as water and cannot be regenerated once oil-fouled. A properly maintained coalescing filter upstream is the single most important factor in desiccant service life.

Partial replacement generally gives poor results, because the spent media limits performance regardless of the fresh media added on top. Full tower replacement is the standard practice when media reaches end of life. Budget for complete changes rather than planning to extend life by topping up.

Prefilter and afterfilter elements on their own schedule, and valve service parts over time. Budget for filters as a recurring cost alongside media, since neglected filters are precisely what shortens media life. The filters are inexpensive relative to the desiccant they protect.