PRODUCT RANGE

Desiccant Air Dryers

Internal Heat Compressed air Dryer

Refrigerated Air Dryer

Filters & Filter Cartridges

Measuring & Control instruments

Replacement Filter Elements & Bags Filters

Internal Heat Reactivated Dryers

              To get compressed air of very low Dew point of (-)60^oC or (-)80⁰ C then heat reactivated dryers are used. In our range of Internal Heat Re-activated Dryers design, the desiccant is regenerated at higher temperature 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 regenerate 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^oC. At this temperature regeneration is complete. Dew point achieved is around (-)40^oC. Whenever lower dew point is required, air purging rate is slightly increased to 5% for (-)60^oC and to 7.5% for (-)80^oC dew point.

Filters
          A Pre-filter with automatic drain valve is used to remove physical moisture from compressed air before entering air dryer. A micronic filter is also used in the dryer outlet to arrest any desiccant dust particles, up to 1 micron size. It provides clean & dry compressed air.                 

Salient Features

• A fully Automatic unit requiring no attention of the operator. Heaters switch on/ off and all valves operate automatically.

• Pressure is equalized to line pressure before changeover of drying vessels. This prevents pressure and flow surge, and, desiccant dusting

• Low purge air requirement in comparison to heat less type dryer.
• Desiccant life is around 5 years.
• Internal heaters provide maximum heat transfer efficiency resulting in lower power requirement.
• Counter current heated dry purge air provides maximum removal of moisture with minimum gas purge loss.
• Heaters are not in physical contact with the desiccant.
• Standard units are designed to deliver dry gas / air of (-)40⁰C dew point. By using more purge airflow, and using molecular sieves, dew point of (-) 80⁰C can be achieved.