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Item # KDF4

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Dry air
Kaeser's KDF series single tower desiccant air dryer significantly lowers compressed air dewpoints. With a simple flow-through design, the dryer economically produces atmospheric dew points as low as -45°F.
The KDF's modular design allows the user to easily install the required pre-filter. The KDF is ideally suited for point of use applications as found in automotive facilities and body shops.
The KDF is a very affordable and economical compressed air dryer that requires no electricity. The silica gel desiccant can be reused which reduces operating costs. Simply bake the silica gel in an oven for the prescribed time and temperature to regenerate the desiccant.
Compressed air enters the desiccant dryer housing and flows downward through the bed of silica gel desiccant. As the desiccant bed becomes saturated, the color of the desiccant change-out indicator changes from blue to white. In the bottom of the housing, the compressed air flows upwards through an integrated dust filter and into an outlet tube where it is moved out of the dryer housing.

Max. Operating Pressure: 200 psig; Max. Operating Temperature : 125°F; Outlet Pressure Dewpoint: -40°F. Single tower desiccant dryer optional coalescing prefilter is supplied with modular connectors and a mounting bracket. Each replacement desiccant kit contains two complete changes of desiccant.

NOTES: 'Rated life at stated flow: 500 min.
C: Minimum bowl removal clearance is 3 inches for all models.

Specifications  · Standard Features  · Applications



Product Family

Clean Air Treatment


Single Tower - KDF

Flow at 100 psig

30 scfm

Connection Size (Inlet/Outlet)

1/2 in.

Capacity at 100ºF Inlet Temperature

13800 scfm

Dimensions (A x B)

4.1 x 27.8 in.

Dim. A

4.1 in.

Dim. B

27.8 in.


22.5 lbs

KOR Coalescing Prefilter


Replacement Desiccant Kit


Max. Operating Pressure

200 psig

Max. Operating Temperature

125 ºF

Outlet Pressure Dewpoint

-40 ºF

Standard Features
  • Moisture indicator - signals the need to replace desiccant
  • Re-usable silica gel
  • Easy to read change-out indicator
  • New rugged design
  • Wider range of sizes

  • Industrial paint booths
  • Body shops
  • Point of use


·  Recommended Installation