REFRIGERATED AIR DRYERS

Refrigerated dryers are general purpose dryers, most economical being less running cost. SAI refrigerant system is environmentally friendly in nature. Refrigeration dryer remove moisture from compressed air to the desired dew point temperature. The dryer includes two separate circuits like compressed air circuit & refrigeration circuit.

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WORKING PRINCIPAL

The saturated compressed air enters in air - to - air heat exchanger (Pre-cooler / Re-heater). Here the incoming hot air is cooled by the out going cold air. This is basically an energy saving heat exchanger. It reduces the load on the refrigeration system. The Pre-cooled incoming air enters in the Air-to- Refrigerant heat exchanger further reducing the air temperature to specified dew point 2°c- 4°c. The air leaving this evaporator is directed to the cyclone separators and water vapor Condensate liquid droplets removed automatically by SAI Automatic Drain Valve. The Hot Gas by-pass valve maintains constant load to the refrigeration system.

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COMPACT HEATLESS AIR DRYERS

Compact heatless air dryer works on the principal of absorption. regenerative air dryers use desiccant media absorbs moisture contaminate from compressed air. The desiccant media can be regenerated by purging air and remove moisture it collect and remove again and again. So the dryers of the compressed air achieved up to atmospheric -40˚c dew point. The traditional refrigeration heat less dryer does not provide sufficient air quality required for special application. SAI regeneration heatless dryer contains smooth uniform achieved alumina balls size that prevents channeling of compressed air flow, which maintains low bed velocities. This maintains air contact time for efficient moisture removal and minimal pressure drops. SAI have electronic control timer for pneumatically pilot valves are chosen for long life and high air flow. A pre filter. oil removing filter, after filter offering purification to 5 micron can be specified. Purge loss and pressure drop are kept at a minimum resulting in lower operating costs.

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WORKING PRINCIPAL

During an operating cycle inlet air directed to pre filter, here moisture and dust particles are removed then air enters to oil removing filter here we remove flooded oil. As wet air flows through the desiccant tower bed the twin tower design of our dryers allows simultaneous compressed air drying and desiccant regenerated without interruption to the compressed air flow. At the end of the drying cycle the regenerated tower is re-pressurized and tower operation is reversed automatically. After tower change over wet inlet air is directed to the regenerated tower and the previously used desiccant is regenerated by the same process. A completed cycle of drying and regeneration is 10 minutes or 6 minutes timing is precisely controlled by SAI electronic timer.

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