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HDA Series

Hertz HDA Heatless Desiccant Air Dryers provide constant -40 °C pressure dew point. These dryers are designed to supply clean and very dry compressed air for critical applications. Pre-filters and after-filters are supplied along with Hertz Heatless Air Dryers to keep the air stream clean and maintain the integrity of the desiccant medium. A very reliable electronic controller makes sure that the dryer operates perfectly all through the service life of the dryer.

HDA Heatless Desiccant Dryers are equipped with very special valves and desiccants in order to perform very well and have one of the lowest pressure drops available in the Market.

General Information

HDA Series

HDA 130 / 185 / 250 / 300 / 360 / 440 / 575 / 680 / 850 1000 / 1250 / 1500 / 1800 / 2200 / 2700 / 3200 / 3600 / 4400 / 5000 / 6300 / 7200 / 8800 / 10800

Hertz HDA Heatless Desiccant Air Dryers provide constant -40 oC pressure dew point. These dryers are designed to supply clean and very dry compressed air for critical applications. Pre-filters and after-filters are supplied along with Hertz Heatless Air Dryers to keep the air stream clean and maintain the integrity of the desiccant medium. A very reliable electronic controller makes sure that the dryer operates perfectly all through the service life of the dryer.

HDA Heatless Desiccant Dryers are equipped with very special valves and desiccants in order to perform very well and have one of the lowest pressure drops available in the Market.

Hertz HDA Heatless Desiccant Air Dryers Principle of Operation

The twin tower design allows for continuous adsorption of water vapor from compressed air by using the hygroscopic desiccant with high crush strength and a high surface / volume ratio. Drying is accomplished by passing compressed air through one desiccant bed adsorbing moisture while the other is being simultaneously regenerated with the expanded purge air.

Regeneration of desiccant is accomplished without the use of heat. The wet bed is dried by diverting a small portion of the super - dry air from the outlet at near atmospheric pressure. The purge flow rate is adjustable to suit the specific outlet conditions (desired dewpoint).

The super dry air flows in a counter direction through the wet bed, sweeping all the water vapour previously absorbed by the desiccant.

HDA ensures pressure equalization in the twin towers prior to switching. This prevents line surge and minimizes desiccant attrition. The tower being reactivated will be gradually re pressurized at the end of its reactivation cycle before switchover take place. Purge flow and de-pressurization are in downward direction, counter flow to the drying air flow.

PLC is standard

HRD Desiccant Dryers has a very reliable electronic controller makes sure that the dryer operates perfectly all through the servicelife of the dryer. Touch screen PLC is capable of showing the cycles as well as the valves which operate on real time. It also shows the dew point (if applicable).

User friendly multi-langual PLC helps the end users understand the operation system any field issues easily.

Activated Alumina

Hertz uses a mixture of adsorption media in its heatless range of desiccant dryers to achieve consistent dewpoint. Activated Alumina, Molecular Sieve and Silica Gel are used in varying ratios depending on the application.

Models and Technical Information

ModelCapacity*ConnectionVoltageMaximum Working PressureMaximum Ambient TemperatureMaximum Inlet TemperatureIncluded Filter Dimensions (mm)Weight
m3/mincfmSizebar0C0Cand TypeLengthWidthHeightKg
HDA 1302.1777G 1" 230V-1-50/60Hz105050HGKO 150 MX+MY+MP8146001312160
HDA 1853.08109G 1"230V-1-50/60Hz105050HGKO 200 MX+MY+MP8066001566180
HDA 2504.17147G 1"230V-1-50/60Hz105050HGKO 250 MX+MY+MP7727601580200
HDA 3005177G 1 ½"230V-1-50/60Hz105050HGKO 300 MX+MY+MP9006901558250
HDA 3606212G 1 ½"230V-1-50/60Hz105050HGKO 500 MX+MY+MP9006901558250
HDA 4407.33259G 1 ½"230V-1-50/60Hz105050HGKO 500 MX+MY+MP9006981759340
HDA 5759.58338G 1 ½"230V-1-50/60Hz105050HGKO 600 MX+MY+MP9006801991500
HDA 68011.3400G 2"230V-1-50/60Hz105050HGKO 851 MX+MY+MP9606802216535
HDA 85014.2500G 2"230V-1-50/60Hz105050HGKO 851 MX+MY+MP10168572277750
HDA 100016.7589G 2"230V-1-50/60Hz105050HGKO 1210 MX+MY+MP107510102386755
HDA 125020.8736DN 80230V-1-50/60Hz105050HGKO 1820 MX+MY+MP1294110024131000
HDA 150025883DN 80230V-1-50/60Hz105050HGKO 1820 MX+MY+MP1300101025471050
HDA 1800301059DN 80230V-1-50/60Hz105050HGKO 1820 MX+MY+MP1513111024791215
HDA 220036.71295DN 80230V-1-50/60Hz105050HGKO 2220 MX+MY+MP1460111027931550
HDA 2700451589DN 80230V-1-50/60Hz105050HGKO 2700 MX+MY+MP1533125228311890
HDA 320053.31883DN 100230V-1-50/60Hz105050HF 3200 MX+MY+MP1653121230542240
HDA 3600602119DN 100230V-1-50/60Hz105050HF 4300 MX+MY+MP1653121032682330
HDA 440073.32590DN 100230V-1-50/60Hz105050HF 4300 MX+MY+MP1905153529103000
HDA 500083.32943DN 150230V-1-50/60Hz105050HF 6500 MX+MY+MP1843171433823180
HDA 63001053708DN 150230V-1-50/60Hz105050HF 6500 MX+MY+MP2114169333283450
HDA 72001204238DN 150230V-1-50/60Hz105050HF 8500 MX+MY+MP2518179530473600
HDA 8800146.75179DN 150230V-1-50/60Hz105050HF 8500 MX+MY+MP2518179533413850
HDA 108001806357DN 200230V-1-50/60Hz105050HF 11000 MX+MY+MP2583187537474200