Air Dryers

Abacus offers best and latest technology Air Dryers for all types of industrial application. These Dryers are used for quick drawing of moisture in industrial process. 

Heatless Type Air Dryers , internal-heater-gas-dryer 

Wet incoming gases after passing through filter, pass through the slide piston valve assembly and are directed towards chamber I where they pass upward through the desiccant. Gas drying takes place by adsorption. Dry gas from chamber I then passes through the Check valve assembly and then through the after-filter to the application or work area. 

While gas is being dried in chamber I the desiccant in chamber II where the desiccant has been wetted in the previous cycle is being simultaneously regenerated. The chamber II is depressurised to atmosphere through the purge valve in the downward direction. A portion of the dry gas passes through the needle valve/orifice plate through the desiccant and flushes out the desorbed moisture.

When the regeneration is complete, the purge valve is closed and the tower is slowly repressurised to line pressure for a smooth changeover. A drying period of 5 minutes provides anefficient dew point of -40°C or better (at atmospheric pressure ). In regeneration process approximately 60 seconds are required for repressurisation. 

Heat of Compression Type (HOC) Heat of Compression type air dryer is a breakthrough in Drying technology. The hot air from the Compressor at 120°C and higher temp, is used directly for regeneration of the desiccant. After regeneration, this air is cooled down to 40°C and then it is dried in second tower. Thus the use of heaters is eliminated. For eg. in the 6+6 Hrs. Cycle the hot air is fed for regeneration for 4 Hrs. and for balance 2 Hr. a changeover takes place where the air is first cooled in cooler, then dried and before going to the outlet, cools the regenerated desiccant bed, thus bringing it down to ambient temperature. This cycle is reversed for the next 4Hrs. where the Adsorber drying the air in the previous cycle goes for regeneration and vice versa. There is considerable power saving in this type of Air Dryers and the dew point is also better than the Refrigerated type of Dryers whereas, the power consumption is almost

Blower Heat Reactivated Type (BHR) 

This dryer is similar to the Internal Heater type dryer except that no process air is wasted. For regeneration, a blower provides the atmospheric air which is pre-heated in an external heater, to regenerate the desiccant bed. Therefore no process air is used for regeneration. The unit is fully automatic. 

Refrigerated Type 

Wet Compressed air undermines efficiency of smallest to the largest system. Therefore, elimination of moisture is must. The drying of Compressed air by Refrigerated Air Dryer is the most economical and reliable process of compressed air treatment. The incoming saturated, moist air is precooled in the Air-to-Air Heat Exchanger (6) by the outgoing dry chilled air. In the process, a greater part of Water Vapour get condensed. Further moisture separation takes place in the Freon-to-Air Heat Exchanger (7) where air is chilled to a temperature of +2 Deg. C. and moisture condenses. This temperature is termed as pressure ‘Dew Point’. The Separator (8) removes the condensate by an Automatic Condensate Trap (12)

Airtight Refrigeration Compressor 
Refrigerant Condensor 
Electric Fan 
Liquid Receiver 
Thermostatic Expansion Valve 
Air-to-Air heat Exchanger 
Freon-to-Air Heat Exchanger 
Centrifugal Condensate Separator 
Accumulator Dewatering Filter 
By-Pass Valve Automatic Condensate Trap Press for Fan (AC only ) 

The compressed dry air is reheated in Air-to-Air-Heat Exchanger and fed to the point of application. As long as compressed air temperature remains above the +2 Deg. C., no further condensation will occur. The Dew Point of +2 Deg. C. is sufficient enough for the smooth and trouble free pneumatic / process applications. The refrigeration circuit is the conventional circuit comprising refrigerant Compressor, Condenser (2), Expansion Valve (5) etc.using Freon R-22 as refrigerant gas. Use of R-22 as a refrigerant is permissible upto the year 2030 AD as per Montreal Protocol. System with Ecofriendly Refrigerant like R-134 A, R-404 A, R-407C are also offered. Air Cooled (AC) models are available upto 200 CFM and higher models are available with water cooled condenser.