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QRS 10-04D In-Line Desiccant Air Dryer

QRS 10-04D In-Line Desiccant Air Dryer

Part #: 8940161795
Availability : Contact Us
15 CFM Color-Change Silica Gel Media




QRS 10-04D - CutawayThe compressed air flow path through the dryer assures desiccant packing and maximum utilization of the desiccant's adsorption qualities. The compressed air enters the dryer (1) and is dispersed through a 70 micron polypropylene element (2) for the removal of particles. The air is then distributed uniformly through the full desiccant bed (3) to the bottom of the intake tube (4). The intake tube is protected by a 40 micron porous bronze element (5). As the desiccant adsorbs moisture, a dramatic and highly visible color change from dark blue to light pink is evident. The color change works its way through the desiccant as the adsorbative qualities of the desiccant are diminished. Once the color change is visible through the exclusive sight dome (6), the full desiccant bed has reached its maximum drying capacity and must be either changed or regenerated. Dry air exits through the inside diameter of the intake tube (7) and out the outlet port of the unit (8).

Adsorption means the attraction of a substance - the adsorbate - to, and its subsequent accumulation on, the surface of a solid material - the adsorbant -
which is caused by physical forces of attraction. Adsorbants are substances which are permeated by a large number of very fine pores which give rise to a large internal surface area. This, in turn, determines the adsorption capacity of the adsorbant, since a   large internal surface can accommodate more adsorbate. Other factors which influence the amount of adsorbate are: temperature, relative humidity and pressure.

Regeneration is accomplished by heating the desiccant to a temperature of 275°F in a drying oven. Regeneration is complete when the desiccant returns to its blue color.

Features & Benefits


  • Initial supply of desiccant included.
  • Delivers extremely dry air as low as -30F dew point.
  • Color change sight glass indicates when desiccant replacement is needed.
  • Compact sizes are ideal for portable or original equipment.
  • Drying efficiency can be tailored to your needs down to -30°F pressure dew point.
  • Highly visible color change from blue to pink through exclusive sight-glass highlights the need for service.
  • Exclusive hard spherical bead resists attrition and dusting and can be recharged.
  • Exclusive intake flow design takes air through entire supply of desiccant for maximum drying capacity.
  • Built-in particulate after-filter prevents downstream dust.
  • Needs no electrical connection.
  • No "purge air" lost as with regenerative dryers.


  • Always install a coalescing filter upstream of the Desiccant Dryer.
  • For compressed air service only, not to be used on life support or breathing air systems.
  • Ideal for dry air for parts blowoff, paint spray systems, air gauging equipment, & laboratory air.


  • 15 SCFM @ 70°F Inlet Temp. @ 100 psig
  • Connections: 1/2" NPT
  • Maximum Pressure: 250 PSI
  • Operating Temperature: 0°F to 120°F
  • Metal Bowl with Sight Gauge
  • Silica Gel Desiccant Media Charge (1-1/4 lb. or 1 Qt.)
  • Weight: 5 lbs.
  • Width: 4-7/8"
  • Height: 8-7/8"

If you have questions on how to properly select a compressed air dryer, contact our knowledgeable customer service toll-free: 866-650-1937 or send us an email request.

Product Brochure

Download Chicago Pneumatic QRS10-04D Literature:

Product Brochure


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