A refrigerated air dryer is a device used in compressed air systems to remove moisture and humidity from the air. It is an essential component in industrial applications where clean and dry compressed air is required to prevent damage to equipment and ensure efficient operation.
The refrigerated air dryer works on the principle of cooling the compressed air to a temperature below its dew point. The dew point is the temperature at which the air becomes saturated and condenses moisture. By cooling the compressed air, the refrigerated air dryer causes the water vapor to condense into liquid form, which is then separated and drained out of the system.
The major components of a refrigerated air dryer include a compressor, condenser, an air to refrigerant exchanger, air-to-air heat exchanger, moisture separator, drain valve, and a refrigeration system.
Here's how it generally operates:
- Compressed air enters the air dryer through an inlet and flows into the air-to-air heat exchanger.
- The heat exchanger cools down the incoming air using an outgoing dry & cold air.
- Relatively cooled air then passes to air to a refrigerant exchanger (Evaporator) and then the refrigeration system, lowering its temperature.
- As the temperature drops, the moisture present in the compressed air begins to condense into liquid form.
- The condensed moisture is separated from the air in a moisture separator and drained out of the system.
- The now dry and cooler compressed air passes through an air-to-air heat exchanger, where it is reheated using the outgoing warm air.
- The reheated air then exits the air dryer through an outlet, ready for use in the compressed air system.
- The maximum dew point attained by a refrigerated air dryer is +3 ℃ (Pressure dew point).
The resulting air quality is Class 4 as per ISO 8573.1.
ANNAIR Refrigerated air dryers are available in various sizes and capacities to accommodate different compressed air systems. They are commonly used in industries such as manufacturing, automotive, food and beverage, pharmaceuticals, and electronics, where the presence of moisture can lead to corrosion, product contamination, and operational issues.
Benefits of using an ANNAIR refrigerated air dryer include increased equipment lifespan, improved product quality, reduced maintenance costs, and enhanced overall system efficiency. By effectively removing moisture from the compressed air, these dryers help prevent damage to pneumatic tools, machinery, and downstream equipment, ensuring reliable and uninterrupted operation.
Future A
The new offering from ANNAIR basket of refrigerated air dryers with a futuristic design concept. The 1st series is named as “Future A’. Based on “Quick Chill” technology for achieving consistent dew point quickly and economically.
Main features are
- Shell & Tube Evaporators – MS shell & Copper Tubing
Silver Star Series (15CFM - 300CFM)
ANNAIR has developed an innovative range of air dryer series called Silver Star. This high efficiently cooling module has a direct effect on reducing energy consumption & pressure drop. The main Features are
- Tube in tube type evaporator.
- CFC free , Eco friendly refrigerant used in system.
- The precise & accurate Hot gas By Pass Valve , which prevents the formation of ice inside the evaporator.
- The high efficiency condensate separator is located within the heat exchanger module. No maintenance is required and gives a high degree of moisture separation.
- Compact design , requires less floor space.
- Range from 15 CFM , capable to work up to inlet air temperature of 60˚C.
Platinum Star Series (High Pressure Dryer) (25CFM - 2000CFM)
ANNAIR Platinum Star Series dryers are high pressure dryers for PET BLOWING applications .These dryers are rugged designed and required comparatively less maintenance. The main Features are
- Tube in tube type evaporator.
- CFC free , Eco friendly refrigerant used in system.
- The precise & accurate Hot gas By Pass Valve , which prevents the formation of ice inside the evaporator.
- The high efficiency condensate separator is located within the heat exchanger module. No maintenance is required and gives a high degree of moisture separation.
- Compact design , requires less floor space.
- Range from 25 CFM to 250 CFM capable to work up to air temperature of 55˚C.
- Can work up to a compressed air pressure of 40 bar.
Gold Star Series (400CFM - 2000CFM)
ANNAIR has developed another most efficient range of Refrigerated Air Dryer series called Gold Star. This high efficient Dryer module can deliver constant dew point at varying load conditions. Main features are
- Tube in Tube & Tube / shell type Exchangers.
- Hot gas by pass valve with precise mechanical adjustment for constant dew point.
- Built with system protectors for electrical & refrigeration systems.
- CFC free , eco friendly refrigerant used.
- Automatic operation , user friendly & compact size.
- Low power consumption.
- Compact design , requires less floor space , Micro processor as option.
- Range from 300 CFM to 2000 CFM capable to work up to air temperature of 55˚C.
