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PERFORMANCE COMPARISON OF VARIOUS DRYING SYSTEMS

COMPARISION SUBJECT	AIR KNIFE SYSTEM (BLOWER ASSISTED)	AIR KNIFE SYSTEM (COMPRESSED AIR ASSISTED)	THERMAL DRYING
Air Velocity	Available between 5000 fpm-40000 fpm	Available between 5000 fpm-18,000 fpm	Low Velocity Used
Noise Levels	Moderate	Low	Very Low
Capital Costs	Moderate	Higher : If you have to provide for air compressors Low : If spare compressor capacity is available	Moderate
Running Cost	Very Low	Higher	Higher
Maintenance	Negligible	Higher	Moderate
Product Protection	Air supply from blower is cleaner. No oil / moisture / dirt to contaminate	Untreated compressed air contains oil / moisture / dirt	Thermal drying cannot be used for product / packing sensitive to heat
Post Drying Care	No specific care or cost involved	No specific care or cost involved	Extra caution and cost involved to handle product dried using this method, because of heat absorbed by product during drying
ADVANTAGES
a) PAY OFF	Very quick pay off. In most cases within six months due to high savings	N.A	N.A
b) Production Speeds	Higher production speeds possible	N.A	N.A