Thursday, January 8, 2009

Clean Air System

How to select Air Dryer


The right air dryer for the application
Selecting the right dryer requires a combination of evaluating technical factors with actual field experience.

Factors include the type of system, size of connecting lines, water capacity, flow capacity (system size), filtration capability, construction materials (i.e., steel or copper), and safe working pressures.

For Refrigerated Compressed Air Dryer:

Step 1:
From catalogue or brochure furnish by supplier;
From Charts; Conditions (Inlet temperature & Air Pressure)
Inlet Air Temperature Co-efficient, let it be = A
Air pressure C0-efficient, let it be = B

Step 2:
To Calculate the necessary air handling capacity for the model to be select;
Therefore; Air Capacity (Air dryer) required = inlet air volume (Flow rate) / [A x B]

Step 3:
Then select the suitable air dryer for the specification above the calculated air dryer capacity.
We therefore choose the Air Dryer model with handling capacity more than the calculated figure.


Benefits from using Air Dryers
Low-pressure dew points derived from implementing air dryers helps prevent corrosion and inhibits the growth of micro-organisms within the compressed air system. Corrosion causes rust and pipe scale that, over time, breaks away and causes damage or blockage in production equipment and, in some cases, can contaminate final product and processes.

Moist air provides an ideal environment for the growth of micro-organisms. If only a few of these bacteria or viruses enter a sterile process or clean production system, damage may result, diminishing product quality or rendering a product unfit for use.

Air dryers are not the same!

Products for the filtering and drying compressed air are often selected because of their initial lower purchase cost, with little regard for the air quality they provide or the cost of operation and maintenance throughout their life cycle.

Dryer equipment with a low purchase price may turn out to be a costly investment in the long run. While initial purchase costs are important, air quality, energy efficiency, and lifetime costs are the real issues.

Poor air quality with too much moisture can damage components in the air system, as well as to end products – costing a manufacturer in terms of both money and reputation. Quality air dryers also minimize pressure loss, a major contributor to operational costs, thus reducing energy consumption.

And finally, quality air dryers last longer than lower priced models, reducing downtime and maintenance costs while contributing to increased output.

By improving air quality, lowering energy consumption, and minimizing maintenance, air dryers from leading providers can reduce the total cost of ownership and improve a manufacturer's bottom line through improved production efficiencies.

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