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KDR Series Externally Heated Regenerative Desiccant Air Dryer

Externally heated regenerative desiccant air dryer is developed based on the successful design of the heatless type and heated type desiccant air dryers. This is the energy saving desiccant air dryer you can rely on!

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Externally heated regenerative desiccant air dryer is developed based on the successful design of the heatless type and heated type desiccant air dryers. The purge air is pre-heated before regeneration to reduce its required capacity in order to achieve an energy saving. It avoids the disadvantage of short switching period of heatless type desiccant air dryer, and at the same time it consumes much less heating energy like heated type desiccant air dryer. This is the energy saving desiccant air dryer you can rely on!


Working principle

This series of desiccant dryer incorporates the working principles of pressure swing adsorption and temperature swing adsorption. Desiccant absorbs water moisture in drying column and being regenerated with high quality dried and heated purge air in regeneration column by air thermal diffusion and high pressure difference mechanisms.






Standard Instrumentation

Left and right column pressure gauges

Temperature transducer

Standard pilot air filter and regulator

KRD series electronic control panel





Working Principle Diagram



Advanced Design


Working conditions
Purge air: ≤4~6%
Working pressure:0.6~1.0Mpa
Inlet oil content: ≤0.1mg/m³
Outlet air pressure dew point: -70 °C ~-20 °C
Desiccant: Activated alumina +Molecular sieves
Working periods: T=60-100min
Inlet temperature: 0 °C ~45 °
Pressure loss: ≤ 0.02Mpa


Model Discharge capacity (Nm3/min) Heater (KW) Discharge pipe connections Weight (kg) Dimensions(mm) Power supply (V/Hz)
L W H
KRD-1MXF 1.2 1.2 DN25 144 605 560 1188 220/50
KRD-2MXF 2.4 1.5 182 605 560 1646
KRD-3MXF 3.8 2 211 750 560 1553
KRD-6MXF 6.5 3 DN40 365 973 800 1818 380/50
KRD-8MXF 8.5 3.5 DN50 560 1062 900 1950
KRD-10MXF 10.7 3.9 645 1162 900 1880
KRD-12MXF 13 3.9 720 1162 900 2090
KRD-16WXF 17 5.1 DN80 930 1374 1100 1908
KRD-20MXF 23 5.7 1120 1374 1100 2208
KRD-25MXF 27 7 1260 1426 1150 2160
KRD-30MXF 32 8.2 1370 1616 1200 2208
KRD-40MXF 45 110 DN100 1700 1666 1200 2402
KRD-50MXF 55 12.5 DN125 2100 2016 1400 2472
KRD-60MXF 65 15 2450 2016 1400 2672
KRD-80MXF 85 20.4 2800 2218 1300 2693
KRD-100MXF 100 30 DN150 5240 2820 1635 3014