Air curtain for process equipment

Air curtains for process equipment are designed to prevent toxic constituents from entering the room through apertures of the equipment. 

FIGURE 7.90 Schematic of air curtains for process equipment isothermal processes. 

For air curtains with unheated outdoor air, air curtains for cooled rooms, air curtains with long passages, or air curtains for process equipment f = 20-40... 

Many localities have strict air emissions regulations that limit the materials and the amount that may be exhausted to the atmosphere. Individual processes or pieces of equipment may require a permit to exhaust any volatile materials. Hazardous air pollutants (HAPs) and volatile organic components (VOCs) are of particular concern. Limits on these parameters can limit mask selection and application processes. For example, curtain coating and spray mask application are not viable in some areas due to the higher percentage of solvent needed for proper application. Screening ntihzes solder mask at a much higher percent solids (less dilution), so air emissions may be only half that of other methods. 

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