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HEAT REACTIVATED TYPE AIR DRYERS

HEAT REACTIVATED TYPE AIR DRYERS

Product Description

Heat Reactivated Type Air Dryers are used when one needs compressed air of very low Dew point of (-) 60°C or (-) 80°C. In this design, the desiccant is regenerated at higher temperature, along with small quantity of Dry air purge. Due to purging with Dry air and thermal regeneration, residual moisture loading on desiccant becomes low and this gives very low Dew point. The Drying unit has 2-vessels filled with Activated Alumina or Molecular sieves desiccant. One vessel remains in drying cycle for 4 hours, while other vessel is simultaneously regenerated at atmospheric pressure. Around 3% flow of dryer capacity is used as purge for regeneration. Electrical heaters are provided in a central finned Stainless steel pipe in both drying vessels. Heating cycle is for 2 hours and in this time hot purge air increases desiccant temperature to around 100°C. At this temperature regeneration is complete (due to dry air purge). Dew point achieved is around (-) 40°C. If still lower Dew point is required, air purging rate is slightly increased to 5% for (-) 60°C and to 7.5% for (-) 80°C Dew point. SAM Gas Filters A Pre-filter with automatic drain valve is provided to remove any physical moisture from compressed air before entering Air dryer. A micronic filter is also provided in the Dryer outlet to arrest any desiccant dust particles, up to 1 micron size.

Technical Specifications

Air Capacity 5 to 3000 NM3/ Hr
Dew Point (-) 40oC to (-) 80oC
Operating Pressure 2 to 50 kg / cm2g

Salient Features

  • Longer life of operation
  • Requires less attention of operator
  • Once installed can be operated automatically
  • Heaters and valves are operated automatically
  • Internal heaters provide maximum efficiency resulting in lower power requirement.
  • Easy maintenance
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